| 1939 LAY Interlocking Control Apparatus Patent |
| 1939 GEORGE Parachute Apparatus Patent Print Art |
| 1939 MUSSINA HENRY Fishing Apparatus Patent |
| 1939 LARRECQ Heat Exchange Apparatus Patent |
| 1939 GEN ELECTRIC Heat Exchange Apparatus Patent |
| 1939 ZAPARKA Airplane Control Apparatus Patent |
| 1939 GEN ELECTRIC Air Flow Control Apparatus Art |
| 1939 FERRIS Elevating Apparatus Patent Print Art |
| 1939 WEIS Portable Sewing Apparatus Patent Print |
| 1939 KEITH HENRY Game Apparatus Patent Print Art |
| 1939 BABCOCK ALFRED Game Apparatus Patent Print |
| 1939 SWENSON GUSTAVE Game Apparatus Patent Print |
| 1939 ROBINSON HAROLD Game Apparatus Patent Print |
| 1939 MOSS Skill Dart Game Apparatus Patent Print |
| 1939 CUPSTID DALLIS Game Apparatus Patent Print |
| 1939 KENT Apparatus For Water Sports Patent |
| 1939 ROBERT Golf Training Apparatus Patent Print |
| 1939 RYAN Railway Signaling Apparatus Patent |
| 1939 PERCIVAL Game Apparatus Patent Print Art |
| 1939 WHELESS Vehicle Loading Apparatus Patent |
| 1939 ARTHUR GUEYDAN Toy Apparatus Patent Print |
| 1939 WILSEY IRVEN Game Apparatus Patent Print |
| 1939 HUGGINS MERION Radio Apparatus Patent Print |
| 1939 BARTON Board Game Apparatus Patent Print |
| 1939 LINCOLN ENG CO Lubricating Apparatus Patent |
| 1939 MERRIFIELD Bag Closing Apparatus Patent |
| 1939 ROTTER Lubricating Apparatus Patent Print |
| 1939 SHELTON ROBERT Game Apparatus Patent Print |
| 1939 FRED ROCK Game Apparatus Patent Print Art |
| 1939 NORMAN Amusement Apparatus Patent Print Art |
| 1939 COREY Radio Tuning Apparatus Patent Print |
| 1939 HOPPES Basketball Backstop Apparatus Patent |
| 1939 HENRY Board Game Apparatus Patent Print Art |
| 1939 TEAL Electron Discharge Apparatus Patent |
| 1939 BROCKETT Safety Car Bumper Apparatus Patent |
| 1939 WILLIAMS HARRY Game Apparatus Patent Print |
| 1939 WALTER Educational Game Apparatus Patent |
| 1939 MARK Coin-Freed Game Apparatus Patent Print |
| 1939 PERCIVAL MASTERS Game Apparatus Patent |
| 1939 DOUGLASS Mail Pouch Exchange Apparatus Art |
| 1939 FALLER Control System And Apparatus Patent |
| 1939 KIRKSEY Trailer Dumping Apparatus Patent |
| 1939 J H KEENEY & CO INC Game Apparatus Patent |
| 1939 THOMAS Game And Game-Board Apparatus Patent |
| 1939 KACHEL Apparatus For Table Tennis Games Art |
| 1939 DUANE W PRICE Amusement Apparatus Patent |
| 1939 ANDERSON Air Flow Control Apparatus Patent |
| 1939 SEVERY Stroboscopic Tuning Apparatus Patent |
| 1939 NORTON ANKETELL Optical Apparatus Patent |
| 1939 BARRON Baseball Projecting Apparatus Patent |
| 1939 GRAYAR WELLS Game Apparatus Patent Print |
| 1939 IRVING Apparatus For Bowling Patent Print |
| 1939 MORRIS Game And Apparatus Therefor Patent |
| 1939 SADLOSKI Safety Apparatus For Divers Patent |
| 1939 PAYSON Boat Trailer Apparatus Patent Print |
| 1939 GREENE ALBERT Game Apparatus Patent Print |
| 1939 RICHARDSON Heat Exchange Apparatus Patent |
| 1939 BOYDEN Apparatus For Playing A Game Patent |
| 1939 DAVENPORT Locomotive Sanding Apparatus Art |
| 1939 ALLEN Interlocking Control Apparatus Patent |
| 1939 WARNER Amusement Apparatus Patent Print Art |
| 1939 HINES Welding Apparatus Patent 7497 |
| 1939 GRONDAHL Railway Signaling Apparatus Patent |
| 1939 JACOBSON Loading Apparatus Patent Print Art |
| 1939 BLASKI Mechanical Teeing Apparatus Patent |
| 1939 REIFER Freight Car Loading Apparatus Patent |
| 1939 CHEATHAM JR Game Apparatus Patent Print Art |
| 1939 ATHEY ISAAC Game Apparatus Patent Print Art |
| 1939 MANNFOLK Steering Apparatus Patent Print |
| 1939 GILBERT CO A C Optical Apparatus Patent |