| 1944 ERLE MARTIN Propeller Hub Damper Patent |
| 1944 JAMISON Reinforced Propeller Patent Print |
| 1944 ROCHE JEAN Propeller Hub Patent Print Art |
| 1944 MILTON Propeller Structure Patent Print Art |
| 1944 CURT Variable Pitch Propeller Patent Print |
| 1944 ROBY Propeller Hub Assembly Patent Print |
| 1944 ERLE Propeller Blade Ice Preventer Patent |
| 1944 EVERTS Variable Pitch Propeller Patent |
| 1944 CARROLL V RADKE Propeller Type Drive Patent |
| 1944 CORRIGAN Variable Pitch Propeller Patent |
| 1944 ALBERT RUPP Screw Propeller Patent Print |
| 1944 WATERVAL Shaftless Propeller Support Patent 9791 |
| 1944 ELWOOD HARPER Propeller Spinner Patent |
| 1944 AVIAT PATENTS INC Propeller Patent Print |
| 1944 CAROL Variable Pitch Propeller Patent Print |
| 1944 LE Propeller Type Drive Patent Print Art |
| 1944 MEEHAN DONALD Propeller Patent Print Art |
| 1944 BEEBE JR Propeller Control Patent Print Art |
| 1944 FREEDMAN GORDON Propeller Patent Print Art |
| 1944 PHILLAS Motorless Boat Propeller Patent |
| 1944 ERLE Propeller Control Means Patent Print |
| 1944 ERLE MARTIN Propeller Blade Patent Print |
| 1944 UNITED AIRCRAFT CORP Propeller Blade Patent |
| 1944 HASLER ROBERT Propeller Blade Patent Print |
| 1944 ELLETT Noiseless Propeller Patent Print Art |
| 1944 DE STEFANO Propeller Patent Print Art |
| 1944 CHARLES Controllable Pitch Propeller Patent |
| 1944 HAINES Propeller Control Mechanism Patent |
| 1944 BROTZ ROMAN Propeller Patent Print Art |