| 1929 WAGNER Ship Propelling Mechanism Patent |
| 1929 DAYTON Automobile Locking Mechanism Patent |
| 1929 LEVIN Equalizing Mechanism Patent Print Art |
| 1929 BRIMM JR Control Mechanism Patent Print Art |
| 1929 GREER Power Dumping Mechanism Patent Print |
| 1929 MCCANN Breech Mechanism For Guns Patent |
| 1929 STODDARD Pedal Operating Mechanism Patent |
| 1929 BUESCHER Saxophone Key Mechanism Patent 17267 |
| 1929 SCULLY Motion Translating Mechanism Patent |
| 1929 LYONS Clutch And Stop Mechanism Patent |
| 1929 HERSHEY MFG COMPANY Switch Mechanism Patent |
| 1929 ZIMMER Car Door Operating Mechanism Patent |
| 1929 MUELLER Needle Shogging Mechanism Patent |
| 1929 JEFFREY MFG CO Equalizing Mechanism Patent |
| 1929 CREMEAN Door Locking Mechanism Patent Print |
| 1929 FREDERICK Carillon Mechanism Patent Print |
| 1929 STYLES Aircraft Control Mechanism Patent |
| 1929 EDWARD YATES Trimming Mechanism Patent |
| 1929 SUCKFIELD Door Supporting Mechanism Patent |
| 1929 REECE Driving And Stopping Mechanism Patent |
| 1929 ALOIS Carburetor Lock Mechanism Patent |
| 1929 MINER INC W H Buffing Mechanism Patent |
| 1929 DREVES HENRY Key Mechanism Patent Print Art |
| 1929 O'CONNOR Shock Absorbing Mechanism Patent |
| 1929 HERSHEY ORVILLE Switch Mechanism Patent |
| 1929 COLBY Switch Locking Mechanism Patent Print |
| 1929 CYRUS HANKINS Car Door Mechanism Patent |
| 1929 WOODARD Truck Centering Mechanism Patent |
| 1929 LEVEQUE BERNARD Driving Mechanism Patent |
| 1929 FRED Airplane Propelling Mechanism Patent |
| 1929 DREVES Key Mechanism Music Instrument Patent 17270 |
| 1929 BENJAMIN Thread Cutting Mechanism Patent |
| 1929 CONTERIO Propelling Mechanism Patent Print |
| 1929 HEWITT Brake Actuating Mechanism Patent |
| 1929 NOMICOS Bumper Supporting Mechanism Patent |
| 1929 KRODEL Propeller Mechanism Patent Print Art |
| 1929 BARRETT Hoisting Mechanism Patent Print Art |
| 1929 LOUNSBURY Buffing Mechanism Patent Print |
| 1929 MOULD Mechanism Lubricating Engines Patent 50739 |
| 1929 LLOYD Locomotive Driving Mechanism Patent |
| 1929 BANKS Record Playing Mechanism Patent Print |
| 1929 LILLEY Gear Shift Mechanism Patent Print |
| 1929 WAGNER Lift Mechanism For Aircraft Patent |
| 1929 HALL Aircraft Propelling Mechanism Patent |
| 1929 MILTON TIBBETTS Locking Mechanism Patent |
| 1929 LOSH GEORGE Organ Mechanism Patent Print |
| 1929 PEHRSON Passageway Drive Mechanism Patent |