| 1950 HEIDMAN Gaming Device Patent 8844 |
| 1950 CASAS Retaining Device For Rotary Hooks Art |
| 1950 TRANSIT RES CORP Motion Damping Device Art |
| 1950 ARMSTRONG Air Blast Device Patent Print Art |
| 1950 DYKE LOUIS Turfing Device Patent Print Art |
| 1950 WATSON HUGH Aerial Device Patent Print Art |
| 1950 GEORGE Device For Dumping Trucks Patent |
| 1950 PHILIPPE Escapement Device Patent Print Art |
| 1950 MCK Offset Printing Device Patent Print Art |
| 1950 MULNO Safety Device For Firearms Patent |
| 1950 HUCK Railway Track Lubricating Device Art |
| 1950 FFORD Clock Display Device Patent Print Art |
| 1950 RIDILL Device For Training Golfers Patent |
| 1950 BENT Brake Cylinder Device Patent Print Art |
| 1950 BRAUN Signal Device For Game Pieces Patent |
| 1950 HANSEN Safety Device For Firearms Patent |
| 1950 ROBBINS HOWARD Toy Device Patent Print Art |
| 1950 FELTON Device For Holding Objects Patent |
| 1950 SYDNEY Toe And Foot Exercising Device Art |
| 1950-60 DEVICE FOR A DOCTOR, SCIENTIST |