| 1938 HACKETHAL PAUL Propeller Patent Print Art |
| 1938 BERLINER HENRY Propeller Patent Print Art |
| 1938 BENDIX PROD CORP Propeller Patent Print Art |
| 1938 EDWARD DROULLARD Propeller Patent Print Art |
| 1938 PETER Reversible Propeller Patent Print Art |
| 1938 BENSON Propeller Guard Patent Print Art |
| 1938 BOYD Automatic Variable Pitch Propeller Art |
| 1938 MILDRED M REID Variable Pitch Propeller Art |
| 1938 GUSTAV FEIGE Propeller Patent Print Art |
| 1938 MICHAEL Airplane Propeller Patent Print Art |
| 1938 AVIAT MFG CORP Propeller Patent Print Art |
| 1938 WILLIAM Propeller Governor Patent Print Art |
| 1938 WALKER Toy Aeroplane Propeller Mounting Art |
| 1938 EVERTS WALTER Propeller Patent Print Art |
| 1938 CALDWELL Method Making Propeller Blades Art |
| 1938 OUTBOARD MOTORS CORP Propeller Mounting Art |
| 1938 THOMPSON MILTON Propeller Patent Print Art |
| 1938 CAMILLE Propeller Rotary Member Art Print |
| 1938 BLAIR Propeller Patent Print Art |
| 1938 HAVILL CLINTON Propeller Patent Print Art |
| 1938 EDWARD Propeller Patent Print Art |
| 1938 THOMPSON Propeller Patent Print Art |
| 1938 MCNEAL ELLIS Propeller Patent Print Art |
| 1938 AUSTIN ELLSWORTH Propeller Patent Print Art |
| 1938 THEODORE Propeller Patent Print Art |
| 1938 LANSING RAYMOND Propeller Patent Print Art |
| 1938 GROENEVELD Controllable Pitch Propeller Art |
| 1938 SMITH Propeller Blade Pitch Regulator Art |
| 1938 HARNETT Screw Propeller Patent Print Art |
| 1938 JOHN WEICHWALD Propeller Patent Print Art |
| 1938 AVIAT CORP Controllable Pitch Propeller Art |