| 1930 GEORGE Motor Propelling Mechanism Boats Art |
| 1930 CANNEY Surface Control Mechanism Airplanes |
| 1930 CHESTER Control Mechanism And Game Patent |
| 1930 EMANUEL Firing Mechanism Automatic Firearms |
| 1930 GLOBE Steering Mechanism Coaster Wagons |
| 1930 HARDESTY Controlling Mechanism Patent Print |
| 1930 WILLIAM Car Coupler Mechanism Patent Print |
| 1930 WINE Door Mechanism For Railway Cars Patent |
| 1930 BOEING CO Surface Control Mechanism Airplanes |
| 1930 WICKS Setter Mechanism Stop Combinations Organs |
| 1930 DONOHUE Propeller Mechanism Aircraft Art |
| 1930 CHESTERFIELD CONTROL Control Mechanism Game |
| 1930 WILLIAM Brake Mechanism Motor Vehicles Art |
| 1930 CANTELO WHITE E Back Wind Mechanism Clocks |
| 1930 HALL Storage Conveying Mechanism Aircraft |
| 1930 HUBBELL Checking Mechanism Patent 7534 |
| 1930 LOUIS Pedal Operated Beating Mechanism Drums |
| 1930 FORT FLOWERS Raising Mechanism Patent Print |
| 1930 FAHRNEY Propelling Mechanism Boats Art |
| 1930's/40s Clock Works Mechanism Key-Wound 10" Car |