| 1944 ERLE MARTIN Propeller Hub Damper Patent |
| 1944 JAMISON Reinforced Propeller Patent Print |
| 1944 MOORE Variable Pitch Propeller Assembly Art |
| 1944 HAMMOND Variable Pitch Propeller Control |
| 1944 DAVIS Propeller Blade Balancing Attachment |
| 1944 BIRSH Design Single Blade Propeller Patent19281 |
| 1944 ROCHE JEAN Propeller Hub Patent Print Art |
| 1944 BURKHALTER Propeller Pitch Change Mechanism |
| 1944 MILTON Propeller Structure Patent Print Art |
| 1944 FREEDMAN BURNHAM ENGINEERING C Propeller |
| 1944 CURT Variable Pitch Propeller Patent Print |
| 1944 MCCOY Means Deicing Propeller Spinners Art |
| 1944 BIRSH Offset Double Propeller Design Patent19282 |
| 1944 ROBY Propeller Hub Assembly Patent Print |
| 1944 ERLE Propeller Blade Ice Preventer Patent |
| 1944 EVERTS Variable Pitch Propeller Patent |
| 1944 CHOJMIK Design Airplane Propeller Patent19283 |
| 1944 CARROLL V RADKE Propeller Type Drive Patent |
| 1944 WALTER Multimotor Single Propeller Airplane |
| 1944 ERLE Inertia Actuated Propeller Control Valve |
| 1944 CORRIGAN Variable Pitch Propeller Patent |
| 1944 ALBERT RUPP Screw Propeller Patent Print |
| 1944 UNITED AIRCRAFT CORP Propeller Control Art |
| 1944 GEN MOTORS CORP Propeller Control Mechanism |
| 1944 EVEREL PROPELLER CORP Variable Pitch Propeller |
| 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 ESCHER WYSS MASCHF AG Variable Pitch Propeller |
| 1944 LE Propeller Type Drive Patent Print Art |
| 1944 CHILLSON Propeller Reversing Pitch Control |
| 1944 MEEHAN DONALD Propeller Patent Print Art |
| 1944 UNITED AIRCRAFT CORP Propeller Hub Damper |
| 1944 ORSETT Design Propeller Patent19284 |
| 1944 WISLICENUS Propeller Adjusting Mechanism |
| 1944 BEEBE JR Propeller Control Patent Print Art |
| 1944 FREEDMAN GORDON Propeller Patent Print Art |
| 1944 PHILLAS Motorless Boat Propeller Patent |
| 1944 KINNUCAN Aircraft Power Plant Propeller Drive |
| 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 DAVID HOUGHTON Propeller AVIAT PATENTS INC |
| 1944 DE STEFANO Propeller Patent Print Art |
| 1944 CHARLES Controllable Pitch Propeller Patent |
| 1944 UNITED AIRCRAFT CORP Propeller Control Means |
| 1944 HAINES Propeller Control Mechanism Patent |
| 1944 BROTZ ROMAN Propeller Patent Print Art |
| 1944 Curtiss Wright Airplane Propeller Theory Book. |