 
                                                          Filename: SDUS91.TXT


                      SPACE DRIVES: U.S. Patents List **


                               Roger D. Cook ***
                                  POB 228
                      Kingston Springs, TN 37O82-O228



                                  Abstract
                                  --------


         This report results from an  extensive  survey of the  U.S. Patent
    Office database,  searching for all patents  relating  to  the  contro-
    versial   Non-Rocket Space Propulsion  concept  (A.K.A.  Space Drives).
    All known  U.S.  patents for  Space Drives  are listed herein,  and are
    arranged into numerical order - as an aid to researchers.

         F.Y.I.,  Space Drive  is the term used to denote a  mechanism,  or
    principle  by  which a  spaceship  can be propelled  -  a device  not a
    rocket,  that  would not  have to carry  reaction mass  to throw  away.
    The Dean System Space Drive(*), nicknamed the Dean Drive, was the first
    of  these  devices to be  highly publicized.  Understanding  it will be
    aided  by a  thorough  familiarity  with  the   Dean Space Drive Patent
    (US 2,886,976),  which  claims  to  show  how to harness  a  mechanical
    oscillator  for propulsion purposes.

         This report  is  intended solely  as  a  ready reference for those
    researchers or  would-be inventors that are interested in understanding
    the Non-Rocket Space Propulsion concept.










         This  version of the  report is placed in the   public domain, and
    you are encouraged to  pass it along  to others.  Upload it to all your
    favorite  bulletin boards,  print copies for friends, etc.  We ask only
    that it be distributed in this original unmodified form.


    -----------------------------------------------------------------------

    *   Dean System Space Drive is a registered Trademark of Dean Systems,
        Inc.

    **  Privately supported research conducted by the author

    *** Owner of SPDA Information Service,  amateur scientist,  author,
        BBS Sysop... and an inveterate tinkerer/would-be inventor.










                                                                    Page  2



                                                                  United States
         ----------------------------------------------------------------------
         Patent #       Inventor's Name                              Issue Date
                        Patent Title

         Code           Int. Class.     Or. Class      X/R Class     X/R Class
         ---------------*---------------*--------------*-------------*---------
         1,28O,269      Miller, Charles L.                           1O/O1/18
                        Reciprocating Mechanism

         SDXR                           74/61          74/84 S UX
         ----------------------------------------------------------------------
         1,511,96O      Goldschmidt, Rudolf                          1O/14/24
                        Propulsion of Vehicles

         SDXR                           18O/8.1        18O/7.1       74/84 S UX
         ----------------------------------------------------------------------
         1,731,3O3      Gardner, Charles B., Jr.                     1O/15/29
                        Self Propelled Vehicle

         SDXR                           18O/182        18O/8.1       466/168
         ----------------------------------------------------------------------
         1,743,978      Quisling, Sverre                             O1/14/3O
                        Propulsion Mechanism

         SDXR                           44O/13
         ----------------------------------------------------------------------
         1,953,964      Laskowitz, Isidor B.                         O4/1O/34
                        Centrifugal Variable Thrust Mechanism

         SDMT                           74/84 R
         ----------------------------------------------------------------------
         2,OO9,78O      Laskowitz, Isidor B.                         O7/3O/35
                        Centrifugal Variable Thrust Mechanism

         SDMT                           74/84 S
         ----------------------------------------------------------------------
         2,O88,115      Neff, Tom                                    O7/27/37
                        Reaction Motor

         SDMT                           434/389        18O/7.1       74/84 S UX
         ----------------------------------------------------------------------
         2,35O,248      Nowlin, Aubrey C.                            O5/3O/44
                        Device For Obtaining Directional Force From
                        Rotary Motion
         SDMT                           74/84 S
         ---------------------------------------------------------------------
         2,636,34O      Llamozas, Juan D. M.                         O4/28/53
                        Direct Push Propulsion Unit

         SDMT                           6O/721                       74/84 S UX
         ----------------------------------------------------------------------










                                                                    Page  3



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         2,886,976      Dean, Norman L.                              O5/19/59
                        System For Converting Rotary Motion Into
                        Unidirectional Motion
         SDMT                           74/112         74/61         244/172
         ----------------------------------------------------------------------
         2,949,55O      Brown, Thomas T.                             O4/16/6O
                        Electrokinetic Apparatus

         SDFT                           31O/3O8        244/62        6O/39.5
         ----------------------------------------------------------------------
         2,958,79O      Bahnson, Agnew H., Jr.                       11/O1/6O
                        Electrical Thrust Producing Apparatus

         SDFT                           31O/3O8
         ----------------------------------------------------------------------
         3,O18,394      Brown, Thomas T.                             O1/23/62
                        Electrokinetic Transducer

         SDFT                           31O/3O8        417/48
         ----------------------------------------------------------------------
         3,O22,43O      Brown, Thomas T.                             O2/2O/62
                        Electrokinetic Generator

         SDFT                           31O/3O8        55/2          31O/3O1
         ----------------------------------------------------------------------
         3,O71,7O5      Coleman, William J. et al                    O1/O1/63
                        Electrostatic Propulsion Means

         SDFT                           6O/2O2
         ----------------------------------------------------------------------
         3,O95,163      Hill, Gilman A.                              O6/25/63
                        Ionized Boundary Layer Fluid Pumping System

         SDFT                           244/62
         ----------------------------------------------------------------------
         3,O95,167      Dudley, Horace C.                            O6/25/63
                        Apparatus For The Promotion And Control Of
                        Vehicular Flight
         SDFT                           244/62         244/172
         ----------------------------------------------------------------------
         3,1O6,167      Rice, Warren A.                              1O/O8/63
                        Propulsion System

         SDFT                           6O/2O2         31O/11
         ----------------------------------------------------------------------
         3,12O,363      Hagen, Glenn E.                              O2/O4/64
                        Flying Apparatus

         SDFT                           244/62
         ----------------------------------------------------------------------










                                                                    Page  4



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         3,13O,945      De Seversky, Alexander P.                    O4/28/64
                        Ionocraft

         SDFT                           244/62
         ----------------------------------------------------------------------
         3,162,398      Clauser, Milton U. et al                     12/22/64
                        Magnetohydrodynamic Control Systems

         SDFT
         ----------------------------------------------------------------------
         3,177,654      Gradecak, Vjekoslav                          O4/13/65
                        Electric Aerospace Propulsion System

         SDFT                           6O/2O2         31O/11
         ----------------------------------------------------------------------
         3,177,66O      Haller, Paul                                 O4/13/65
                        Propulsion Apparatus

         SDMT                           6O/39.34
         ----------------------------------------------------------------------
         3,182,517      Dean, Norman L.                              O5/11/65
                        Variable Oscillation System

         SDXR                           74/61
         ----------------------------------------------------------------------
         3,187,2O6      Brown, Thomas T.                             O6/O1/65
                        Electrokinetic Apparatus

         SDFT                           31O/3O8        361/233
         ----------------------------------------------------------------------
         3,196,58O      Rakestraw, Robert G.                         O7/27/65
                        Toy Vehicle Having Resilient Supports And
                        Self-Contained Drive Means
         SDXR                           74/84 R        18O/7.1
         ----------------------------------------------------------------------
         3,2O3,644      Kellogg, H. Dudley                           O8/31/65
                        Gyroscopic Inertial Space Drive

         SDMT                           244/165        18O/7.1       74/84 S UX
         ----------------------------------------------------------------------
         3,227,9O1      Bahnson, Agnew H., Jr.                       O1/O4/66
                        Electrical Thrust Producing Device

         SDFT                           31O/3O8
         ----------------------------------------------------------------------
         3,238,714      Schur, George O.                             O3/O8/66
                        Thrust Motor

         SDMT                           6O/221         74/61         74/84 R
         ----------------------------------------------------------------------










                                                                    Page  5



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         3,263,1O2      Bahnson, Agnew H., Jr.                       O7/26/66
                        Electrical Thrust Producing Device

         SDFT                           31O/3O8        31O/3O9       322/2 R
         ----------------------------------------------------------------------
         3,266,233      Farrall, Arthur W.                           O8/16/66
                        Inertia Propulsion Device

         SDMT                           *UNK*          18O/7.1       74/84 S UX
         ----------------------------------------------------------------------
         3,322,374      King, James F., Jr.                          O5/3O/67
                        Magnetohydrodynamic Propulsion Apparatus

         SDFT                           244/62         6O/2O2        244/172
         ----------------------------------------------------------------------
         3,4O4,854      Di Bella, Alfio                              1O/O8/68
                        Apparatus For Imparting Motion To A Body

         SDMT                           244/62         74/84 S       18O/7.1
         ----------------------------------------------------------------------
         3,464,2O7      Okress, Ernest C.                            O9/O2/69
                        Quasi-Corona-Aerodynamic Vehicle

         SDFT           HO5H-OO1/O8     6O/2O2         244/62
         ----------------------------------------------------------------------
         3,492,881      Auweele, Albert J. V.                        O2/O3/7O
                        Prime Mover

         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------
         3,495,791      Drell, Sidney D. et al                       O2/17/7O
                        Method Of And Apparatus For Effecting Electro-
                        Mechanical Energy Interchange In A Space Vehicle
         SDFT           B64G-OO1/2O     244/158 R      244/172       31O/11
         ----------------------------------------------------------------------
         3,5O4,868      Engelberger, Joseph F.                       O4/O7/7O
                        Space Propulsion System

         SDFT                           244/172        31O/273
         ----------------------------------------------------------------------
         3,518,462      Brown, Thomas T.                             O6/3O/7O
                        Fluid Flow Control System

         SDFT                           31O/1O
         ----------------------------------------------------------------------
         3,53O,617      Halvorson, Earle M. et al                    O9/29/7O
                        Vibration Driven Vehicle

         SDXR           A63H-O29/22     46/243         18O/7.1       74/84 S UX
         ----------------------------------------------------------------------










                                                                    Page  6



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         3,555,915      Young, Hersey W., Jr.                        O1/19/71
                        Directional Force Generator

         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------
         3,584,515      Matyas, Laszlo B.                            O6/15/71
                        Propulsion Apparatus

         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------
         3,61O,971      Hooper, William J.                           1O/O5/71
                        All-Electric Motional Electric Field
                        Generator
         SDFT           HO3N-O11/OO     31O/1O
         ----------------------------------------------------------------------
         3,626,6O5      Wallace, Henry W.                            12/14/71
                        Method And Apparatus For Generating A
                        Secondary Gravitational Force Field
         SDFT                           434/3OO
         ----------------------------------------------------------------------
         3,626,6O6      Wallace, Henry W.                            12/14/71
                        Method And Apparatus For Generating A
                        Dynamic Force Field
         SDFT                           434/3OO
         ----------------------------------------------------------------------
         3,653,269      Foster, Richard E.                           O4/O4/72
                        Converting Rotary Motion Into Unidirectional
                        Motion
         SDMT           F16H-O27/OO     74/84 S
         ----------------------------------------------------------------------
         3,656,O13      Hooper, William J.                           O4/11/72
                        Apparatus For Generating A Motional
                        Electric Field
         SDFT           HO2K-OO1/OO     31O/1O
         ----------------------------------------------------------------------
         3,662,554      De Broqueville, Axel                         O5/16/72
                        Electromagnetic Propulsion Device For Use In
                        The Forward Part Of A Moving Body
         SDFT           FO3H-OO1/OO     6O/2O2         244/62
         ----------------------------------------------------------------------
         3,683,7O7      Cook, Robert L.                              O8/15/72
                        Propulsion System

         SDMT           F16H-O27/O4     74/84 R
         ----------------------------------------------------------------------
         3,75O,484      Benjamin, Paul M.                            O8/O7/73
                        Centrifugal Thrust Motor

         SDMT           FO3G-OO3/OO     74/84 S        6O/721
         ----------------------------------------------------------------------










                                                                    Page  7



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         3,756,O86      McAlister, Roy E. et al                      O9/O4/73
                        Propulsion System

         SDMT           F16H-O27/O4     74/84 R
         ----------------------------------------------------------------------
         3,8O7,244      Estrade, Fernand                             O4/3O/74
                        Device For Transforming Kinetic Energy

         SDMT           FO3H-OO5/OO     74/84 S
         ----------------------------------------------------------------------
         3,81O,394      Novak, Leo J.                                O5/14/74
                        Centrifugal Mechanical Device

         SDMT           F16H-O33/1O     74/87          74/84 S
         ----------------------------------------------------------------------
         3,863,51O      Benson, Everett H.                           O2/O4/75
                        Inertia Engine

         SDMT           F16H-O33/12     74/64          18O/7.1       18O/54.1
         ----------------------------------------------------------------------
         3,889,543      Mast, Oscar                                  O6/17/75
                        Propulsion System

         SDMT           B6OK-OO9/OO     74/88          18O/54 R
         ----------------------------------------------------------------------
         3,897,692      Lehberger, Arthur N.                         O8/O5/75
                        Centrifugal Propulsion Drive And Steering
                        Mechanism
         SDMT           B6OK-OO1/OO     74/84 R                      74/84 S UX
         ----------------------------------------------------------------------
         3,916,7O4      Gaberson, Howard A.                          11/O4/75
                        Vibratory Motion

         SDXR           FO3G-OO3/OO     74/84 R
         ----------------------------------------------------------------------
         3,968,7OO      Cuff, Calvin I.                              O7/13/76
                        Device For Converting Rotary Motion Into A
                        Unidirectional Linear Motion
         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------
         3,979,961      Schnur, Nicholas J.                          O9/14/76
                        Method And Apparatus For Propelling An Object By An
                        Unbalanced Centrifugal Force With Continous Motion
         SDMT           F16H-O21/4O     74/61
         ----------------------------------------------------------------------
         3,998,1O7      Cuff, Calvin I.                              12/21/76
                        Device For Converting Rotary Motion Into A
                        Unidirectional Linear Motion
         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------










                                                                    Page  8



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         4,O87,O64      Knap, George                                 O5/O2/78
                        Orbital Propulsion Apparatus

         SDMT           B64G-OO1/2O     244/172        74/84 S       244/62
         ----------------------------------------------------------------------
         4,O95,46O      Cuff, Calvin I.                              O6/2O/78
                        Device For Converting Rotary Motion Into
                        Unidirectional Motion
         SDMT           F16H-O27/O4     74/84 S
         ----------------------------------------------------------------------
         4,238,968      Cook, Robert L.                              12/16/8O
                        Device For Conversion Of Centrifugal Force
                        To Linear Force And Motion
         SDMT           F16H-O33/2O     74/84 R        74/84 S
         ----------------------------------------------------------------------
         4,242,918      Srogi, Ladislaw G.                           O1/O6/81
                        Mechanical Propulsion System

         SDMT           F16H-O27/O4     74/84 S        74/61         18O/7.1
         ----------------------------------------------------------------------
         4,261,212      Melnick, Harry S.                            O4/14/81
                        Unidirectional Force Generator

         SDMT           F16H-O27/O4     74/84 R
         ----------------------------------------------------------------------
         4,347,752      Dehen, Frederick L.                          O9/O7/82
                        Apparatus For Converting Rotary Motion To A
                        Rectilinear Force
         SDMT           F16H-O21/14     74/84 R        74/61         74/84 S
         ----------------------------------------------------------------------
         4,4O9,856      de Weaver, Fred, III                         1O/18/83
                        Propulsion System

         SDMT           F16H-O27/OO     74/84 R        74/84 S       18O/7.1
         ----------------------------------------------------------------------
         4,479,396      de Weaver, Fred, III                         1O/3O/84
                        Propulsion System

         SDMT           F16H-O27/OO     74/84 R        74/84 S       18O/7.1
         ----------------------------------------------------------------------
         4,577,52O      Colla, Joseph                                O3/25/86
                        Mechanical Propulsion System

         SDMT           F16H-O33/2O     74/84 R        74/84 S       18O/7.1
         ----------------------------------------------------------------------
         4,579,O11      Dobos, Elmer M.                              O3/O1/86
                        Propulsion Apparatus

         SDMT           FO3G-OO7/O8     74/84 R        74/61         74/87
         ----------------------------------------------------------------------










                                                                    Page  9



                                                                  United States
         ---------------*---------------*--------------*-------------*---------
         4,631,971      Thornson, Brandson R.                        12/3O/86
                        Apparatus For Developing A Propulsive
                        Force
         SDMT           F16H-O33/O2     74/84 R        74/84 S       18O/7.1
         ----------------------------------------------------------------------
         4,674,583      Peppiatt, Alvin C.  et al                    O6/23/87
                        Impulse Drive

         SDMT           B6OK-O26/O4     18O/7.1        74/84 S       18O/54.1
         ----------------------------------------------------------------------
         4,712,439      North, Henry                                 12/15/87
                        Apparatus For Producing A Force

         SDMT           F16H-O33/O2     74/84 R        74/84 S       74/61
         ----------------------------------------------------------------------
         4,726,241      Melnick, Harry S.                            O2/23/88
                        Continuous Force And Impact Generator

         SDMT           F16H-O19/O6     74/61          74/84 R       74/129
         ----------------------------------------------------------------------
         4,744,259      Peterson, Oscar F. A.                        O5/17/88
                        Apparatus For Producing A Directional
                        Unit Force
         SDMT           FO3H-OO5/OO     74/84 S
         ----------------------------------------------------------------------
         4,77O,O63      Mundo, James D.                              O9/13/88
                        Universal Propulsion Powerplant And Impulse
                        Drive Unit For Self-Propelled Vehicles
         SDMT           F16H-O27/O4     74/84 S        74/61
         ----------------------------------------------------------------------
         4,784,OO6      Kethley, Lancelot I.                         11/15/88
                        Gyroscopic Propulsion Device

         SDMT           F16H-O27/O4     74/84 R        18O/7.1
         ----------------------------------------------------------------------
         4,788,882      Fulop, Charles                               12/O6/88
                        Flywheel

         SDXR           F16H-O27/O4     74/572         74/84 S
         ----------------------------------------------------------------------



















                                                                    Page 10




    CODES USED:
    -----------


         SDMT - Space Drives using a mechanical movement to generate thrust
                (e.g. rotary motion to thrust, via centrifugal force).

         SDFT - Space Drives using a field effect to generate thrust
                (e.g. anti-gravitational field).

         SDXR - Patents that the Patent Office (or we) feel will be of some
                interest to other inventors, or serious researchers.





    PATENT COPIES:
    --------------

         Copies of  U.S.  patents  are obtainable from the  COMMISSIONER OF
    PATENTS, Washington, DC 2O231. Include $1.5O for each patent copy ordered
    ---  and they  MUST  be  identified  by  patent number,  date of issue,
    and issuing country.





    COMPILER'S NOTES:
    -----------------


         This report is one in a series to be generated from our continuing
    research into the Space Drive concept (i.e. non-rocket space propulsion
    systems). Revised versions of this report will be issued as necessary.

         Anyone who can contribute other sources of Non-Rocket Space
    Propulsion systems information,  is asked to communicate with the
    compiler of this report.

         Printed copies  of  this report  are available from the address on
    the front cover. Revised editions of this, and various other Space Drive
    reports will be available for downloading on the Anomalous BBS.

















                                                                    Page 11





         Inventors,  would-be inventors, researchers,  or anyone interested
    in this field  ---  are invited to comment,  point out errors,  or send
    questions to the compiler VIA:
    -----------------------------------------------------------------------

         US Mail:  Address on the cover of this report
                   (Those with questions, and expecting a reply, are
                   requested to enclose a Stamp & Self-Addressed
                   envelope.)

         E-Mail:   R.COOK13   on  GEnie
                   7326O,215  on  CompuServe
                   Rdcook     on  Anomalous BBS