| 1950 KEITH Operating Lever Mechanism Rotary Hand Brakes |
| 1950 ALLEN Retractable Lift Rotor Mechanism Aircraft |
| 1950 GELLMAN Rotary Hook Mechanism Sewing Machines |
| 1950 HALE Work Feeding Mechanism Sewing Machines |
| 1950 MORSE Control Mechanism Marine Steering Gear |
| 1950 MEYER Hoist Dumping Mechanism Separable Bodies |
| 1950 CARL Feed Mechanism Projectile Assembly Machines |
| 1950 MAN Filler Feeding Mechanism Sewing Machines |
| 1950 PINKVOSS Trimmer Mechanism Sewing Machines |
| 1950 HEIL CO Hoist Dumping Mechanism Separable Bodies |
| 1950 SAUL Firing Mechanism For Mortars Patent |
| 1950 SANFORD Feeding Mechanism Automatic Guns |
| 1950 OWENS Mechanism Adjusting Setting Radios Other |
| 1950 WILLIAMS Cartridge Feeding Mechanism Firearms |
| 1950 REMINGTON ARMS INC Firing Mechanism Firearms |
| 1950 TILLMAN Door Mechanism For Railway Cars Art |
| 1950 SCHROEDER Control Mechanism Outboard Motors |
| 1950 PAUL Drive Mechanism Self Propelled Vehicles |
| 1950 DATH Winding Mechanism For Deck Hoists Art |
| 1950 REINHOLD Firing Mechanism Use In Armed Mounts |