| 1928 LOOMIS Wood Wind Octave Key Mechanism Patent 17263 |
| 1928 MORRIS Carrousel Driving Mechanism Patent |
| 1928 BAUER Bell Ringing Mechanism Patent Print |
| 1928 BLOSSOM Automobile Locking Mechanism Patent |
| 1928 LAWRENCE Mail Carrier Mechanism Patent |
| 1928 BROCK Doll-Arm-Actuating Mechanism Patent |
| 1928 PECK Propelling Mechanism For Boats Patent |
| 1928 ALLEN Driving And Stopping Mechanism Patent |
| 1928 VON Safety Mechanism For Firearms Patent |
| 1928 MCGINLEY Locking Mechanism Patent Print Art |
| 1928 HADAWAY Welt Attaching Mechanism Patent |
| 1928 ANDERSON WILLIAM Switch Mechanism Patent |
| 1928 O'CONNOR Buffing Mechanism Patent Print Art |
| 1928 VIKTOR Mechanism For Wheeling Cribs Patent |
| 1928 THOMAS EDWARD Locking Mechanism Patent |
| 1928 MINER INC W H Buffing Mechanism Patent |
| 1928 SMITH Door Closing Mechanism Patent Print |
| 1928 VOICES INC Talking Toy Mechanism Patent |
| 1928 WILCOX EDGAR Switch Mechanism Patent Print |
| 1928 WANDS Switch Operating Mechanism Patent |
| 1928 LOOMIS Automatic Octave Mechanism Patent 17260 |
| 1928 SPILLMAN Driving Mechanism Fun Tool Patent 32753 |
| 1928 MCCANN Breech Opening Mechanism Patent |
| 1928 CONNER Golf Indicating Mechanism Patent |
| 1928 HASELTINE Shock Absorbing Mechanism Patent |
| 1928 BORIS Automatic Explosive Mechanism Patent |
| 1928 HASELTINE Buffing Mechanism Patent Print |
| 1928 TREVOR Ordnance Breech Mechanism Patent |
| 1928 BRIMM Stabilizer Adjusting Mechanism Patent |