| 1941 GAY Gymnastic Testing Apparatus Patent |
| 1941 MATTHEWS Switching Apparatus Patent Print |
| 1941 BAUGHMAN Railway Signaling Apparatus Patent |
| 1941 BLOOM NATHAN Game Apparatus Patent Print |
| 1941 MCGOWAN Railway Braking Apparatus Patent |
| 1941 JOHN A RUSSELL Game Apparatus Patent Print |
| 1941 RICHARD GROETCHEN Ball Game Apparatus Art |
| 1941 BREITENSTEIN Bowling Apparatus Patent Print |
| 1941 GIRDEN BARNEY Game Apparatus Patent Print |
| 1941 SLOAT Load Carrying Apparatus Patent Print |
| 1941 MAYNES Amusement Apparatus Patent Print Art |
| 1941 VICTOR Game Playing Apparatus Patent Print |
| 1941 MAHER WILLIAM Dumping Apparatus Patent |
| 1941 JACK Merchandise Handling Apparatus Patent |
| 1941 PARKER Target Throwing Apparatus Patent |
| 1941 KESSLER Baseball Game Apparatus Patent |
| 1941 ASHWORTH Electrical Control Apparatus Art |
| 1941 BECHTOL Amusement Apparatus Control Patent |
| 1941 O'HAGAN Railway Track Circuit Apparatus Art |
| 1941 LE MAY Game Apparatus Patent Print Art |
| 1941 CORNELIUS Dumping Apparatus Patent Print |
| 1941 HENNINGER Electric Motor Apparatus Patent |
| 1941 MILLIGAN Transport Apparatus Patent Print |
| 1941 HENRY Combination Exercising Apparatus Art |
| 1941 COURTNEY Amusement Apparatus Patent Print |
| 1941 WILLIAMS Game Apparatus Patent Print Art |
| 1941 ROBERT Radio Control Apparatus Patent Print |
| 1941 ALEXANDER GLOVER Game Apparatus Patent |
| 1941 RIEBE Telephone Signaling Apparatus Patent |
| 1941 WALTER Hairspring Bending Apparatus Patent |
| 1941 BALLY MFG CORP Game Apparatus Patent Print |
| 1941 WILSEY IRVEN Game Apparatus Patent Print |
| 1941 LE MAY Racing Game Apparatus Patent Print |
| 1941 HOMSHER CARL Switch Apparatus Patent Print |
| 1941 HERR EDWARD Game Apparatus Patent Print Art |
| 1941 WOOD Light Recording Apparatus Patent Print |
| 1941 CHRISTIE Drop Pit Apparatus Patent Print |
| 1941 GRANT Liquid Discharge Apparatus Patent |
| 1941 MCCUNE Brake Apparatus For Vehicles Patent |
| 1941 FIRESTONE JOHN Game Apparatus Patent Print |
| 1941 STARK EUGENE Game Apparatus Patent Print |
| 1941 GIBBS THOMAS Recording Apparatus Patent |
| 1941 FEDERICO Badminton Practice Apparatus Art |
| 1941 YOUNG Golf Practicing Apparatus Patent |
| 1941 MARTIN Track Circuit Apparatus Patent Print |
| 1941 CHRICHARD Livestock Spraying Apparatus |
| 1941 HYLAND Lifeboat Launching Apparatus Patent |
| 1941 OSCAR LOWENHERZ Ball Game Apparatus Patent |
| 1941 OSCAR Ball Game Apparatus Patent Print Art |
| 1941 TEAL Electron Discharge Apparatus Patent |
| 1941 ALEXANDER Game Apparatus Patent Print Art |
| 1941 CHESTER Signaling Apparatus Patent Print |
| 1941 MATHER Fly Control Method And Apparatus |
| 1941 CHARLES Game Apparatus Patent Print Art |
| 1941 EMMA C MAYNES Amusement Apparatus Patent |
| 1941 MATHIAS Illusion Apparatus Patent Print Art |
| 1941 WILLIG EDWARD Game Apparatus Patent Print |
| 1941 HILL ULLRICH Navigation Apparatus Patent |
| 1941 SCHMIDT Portable Game Apparatus Patent |
| 1941 ROGERS GEORGE Pouring Apparatus Patent |
| 1941 MCWHIRTER Control Apparatus Patent Print |
| 1941 LE Music Producing Apparatus Patent Print |
| 1941 KINGSLEY Game Or Amusement Apparatus Patent |
| 1941 MANSON Lifesaving Apparatus Patent Print |
| 1941 MANNFOLK Steering Apparatus Patent Print |
| 1941 ANDREW FERRERI Game Apparatus Patent Print |
| 1941 FORTINGTON Cleat And Like Apparatus Patent |
| 1941 RUDOLPH SIMMON Timing Apparatus Patent |
| 1941 JOHNSTON DEWEY Game Apparatus Patent Print |
| 1941 RAYMOND T MOLONEY Bowling Apparatus Patent |
| 1941 WHITING CORP Drop Pit Apparatus Patent |
| 1941 JACOB PRESSMAN Game Apparatus Patent Print |
| 1941 EARL WILLIFORD Amusement Apparatus Patent |
| 1941 ARNOLD Amusement Apparatus Patent Print Art |
| 1941 MOORE WILLIAM Game Apparatus Patent Print |
| 1941 CICERO Amusement Apparatus Patent Print Art |
| 1941 PERCY GARDNER Sewing Apparatus Patent Print |
| 1941 PHILLIPS Rail Lubricating Apparatus Patent |
| 1941 ARTHUR Theft Prevention Apparatus Patent |
| 1941 SMITH PERCY Game Apparatus Patent Print Art |
| 1941 ROCKOLA Casing Sound Apparatus Patent 42374 |
| 1941 TEMPLE Amusement Apparatus Patent Print Art |
| 1941 CHARLES Apparatus For Making Trimmings Art |
| 1941 THOMPSON Track Circuit Apparatus Patent |
| 1941 KOLTS TENNIES Game Apparatus Patent Print |
| 1941 WILSON Airplane Launching Apparatus Patent |