| 1927 FRED Talking Toy Mechanism Patent Print Art |
| 1927 JACK WILSON Brake Mechanism Patent Print |
| 1927 JOHN Boat Propelling Mechanism Patent Print |
| 1927 SHERMAN Gun Firing Mechanism Patent Print |
| 1927 NELSON JOHN Locking Mechanism Patent Print |
| 1927 ALLEN Octave Key Mechanism Patent Print Art |
| 1927 ESSEN PIETER Breech Mechanism Patent Print |
| 1927 CONWAY Lifting Mechanism Patent Print Art |
| 1927 OHLENDORF Bumper Mechanism Patent Print Art |
| 1927 BAGHOS Propelling Mechanism Patent Print |
| 1927 WEIS JOHN Needle Mechanism Patent Print Art |
| 1927 MYRE Slide Game Mechanism Patent Print Art |
| 1927 EDMUND THUM Toy Mechanism Patent Print Art |
| 1927 KINNE EDMUND Coupler Mechanism Patent Print |
| 1927 SMITH GEORGE Control Mechanism Patent Print |
| 1927 GILPIN Upper Buffer Mechanism Patent Print |
| 1927 GORTON Sear Mechanism For Guns Patent Print |
| 1927 NAT Shock Absorbing Mechanism Art Print |
| 1927 CAMP PERCY Brake Mechanism Patent Print Art |
| 1927 BARNES Trigger Mechanism Firearms Art Print |