| 1931 WILLIAM W MACFARLANE Automobile Bumper Mounting |
| 1931 LUM Wall Mounting Hand Telephone BELL Patent 41138 |
| 1931 HEINRICH Spring Mounting Field Guns Art |
| 1931 ADLAKE CO Lamp Mounting Patent Print Art |
| 1931 REDFIELD Telescope Sight Mounting Patent |
| 1931 LARSON CARL Lamp Mounting Patent Print Art |
| 1931 VIETOR FREDERICK Piano Key Mounting Patent |
| 1931 KIGER Sealed Identification Tag Case Mounting |
| 1931 FORSBERG Pedal Construction Mounting Art |
| 1931 ELMER Mounting For Car Axles Patent Print |
| 1931 ABERCROMBIE FITCH Telescopic Rifle Sight Mounting |
| 1931 WINKLER Mounting Support Rear View Mirrors |
| 1931 STEINWAY & SONS Piano Key Mounting Patent |
| 1931 MOTO Mounting Traffic Warning S Art Print |
| 1931 ERNEST Automobile Bumper Mounting Art |
| 1931 J G BRILL Mounting Car Axles Art Print |
| 1931 GULBRANSEN Pedal Construction Mounting Art |
| 1931 REDFIELD Telescope Mounting For Guns Patent |
| 1931 HURLEY Mounting Traffic Warning S Art Print |
| 1931 J G BRILL Motor Mounting Car Trucks Art |
| 1931 OSMAN RALPH Frame Mounting Patent Print Art |
| 1931 ELMER Motor Mounting For Car Trucks Patent |
| 1931 SVENDSEN Propeller Mounting Patent Print |
| 1931 AMOS T DWIGHT Motor Mounting Patent Print |
| 1931 DECKER Motor Mounting Art |