| 1950 KELLER Baseball Game Apparatus Patent Print |
| 1950 ROTH Chance Game Apparatus Patent Print Art |
| 1950 GITTINGS Electronic Timing Apparatus Patent |
| 1950 DE Explosive Testing Apparatus Patent Print |
| 1950 ALBERT Ship Salvaging Apparatus Patent |
| 1950 BUTLER Golf Practice Apparatus Patent Print |
| 1950 FRISK Watch Stem Trimming Apparatus Patent |
| 1950 MICHAEL Pontoon Flotation Apparatus Patent |
| 1950 NICHOLSON Traffic Protection Apparatus Art |
| 1950 DON Dropping Target Apparatus Patent Print |
| 1950 FRANK Coin Trick Apparatus Patent Print Art |
| 1950 BENNETT Baseball Practice Apparatus Patent |
| 1950 SMITH Air Conditioning Apparatus Patent |
| 1950 PLOCK Oyster Opening Apparatus Patent 10598 |
| 1950 LEHDE RICHARD Timing Apparatus Patent Print |
| 1950 GILSON Coded Track Circuit Apparatus Patent |
| 1950 KERSHAW Scotch Block Apparatus Patent Print |
| 1950 BARKER Amusement Apparatus Patent Print Art |
| 1950 ROLAND Aerial Spraying Apparatus Patent |
| 1950 DORN Foot Steering Apparatus Patent Print |
| 1950 BANKAUF Hopper Car Discharge Apparatus Art |
| 1950 ORSON BROWER Word Game Apparatus Patent |
| 1950 ROY HOWARD Board Game Apparatus Patent |
| 1950 HOLDEMAN Drop Pit Apparatus Patent Print |
| 1950 LEWIS Boat Lowering Apparatus Patent Print |
| 1950 JOHNSON CLAUDE Display Apparatus Patent |
| 1950 CUTHBERT Parachute Control Apparatus Patent |
| 1950 KEEFE Photographic Apparatus Patent Print |
| 1950 WINZEN Aerial Delivery Apparatus Patent |
| 1950 POND Apparatus For Teaching Acrobatics Art |
| 1950 KOCI JERRY Game Apparatus Patent Print Art |
| 1950 AXTELL Bomb Dismantling Apparatus Patent |
| 1950 JOHNSON Tetherball Game Apparatus Patent |
| 1950 LOONEY Deceleration Apparatus Patent Print |
| 1950 RENE BERGERIOUX Table Game Apparatus Patent |
| 1950 OLSON OLIVER Game Apparatus Patent Print |
| 1950 KAPPEN Material Handling Apparatus Patent |
| 1950 ROHRER Program Scheduling Apparatus Patent |
| 1950 TAYLOR Golf Practicing Apparatus Patent |
| 1950 SCHRAMM Drop Pit Apparatus Patent Print Art |
| 1950 DALE Practice Shooting Apparatus Patent |
| 1950 ROTHER Ventilating Apparatus Patent Print |
| 1950 JACKSON Practice Golf Game Apparatus Patent |
| 1950 ASARO Fish Unloading Apparatus Patent Print |
| 1950 WILLIAM Rolling Ball Game Apparatus Patent |
| 1950 MEAD Antitheft Switch Apparatus Patent |