| 1920 SALVATORE Marine Propeller Patent Print Art |
| 1920 LEE CHARLES Fan Propeller &C Patent Print |
| 1920 EUGENE Variable Pitch Propeller Patent |
| 1920 ST JOHN Rubber Propeller Patent Print Art |
| 1920 SHERWOOD Duplex Propeller Patent Print Art |
| 1920 GALLAGHER FRANK Propeller Patent Print Art |
| 1920 BRUNO SCHMELZER Propeller Patent Print Art |
| 1920 LA FLEUR Propeller Patent Print Art |
| 1920 SIMONS Wing Propeller For Aircraft Patent |
| 1920 WICKER Aeroplane Propeller Blade Patent |
| 1920 FLATTUM ALBERT Aerial Propeller Patent |
| 1920 EDWARD Marine Propeller Patent Print Art |
| 1920 SANFORD CHARLES Propeller Patent Print Art |
| 1920 LEINWEBER VICTOR Propeller Blade Patent |
| 1920 SPERRY Twin Propeller Aeroplane Patent |
| 1920 STRONG Air Machine And Propeller Patent |
| 1920 SHERWOOD STARR Duplex Propeller Patent |
| 1920 PRATT ROBERT Propeller Patent Print Art |
| 1920 HERMANN Propeller Or The Like Patent Print |
| 1920 MOTT SAMUEL Aeroplane Propeller Patent |
| 1920 SHAFFER Aeroplane Propeller Patent Print |
| 1920 BOEHM VALTIN Propeller Patent Print Art |
| 1920 HENRY LEITNER Screw Propeller Patent Print |
| 1920 DAVEY ODDY Propeller Patent Print Art |
| 1920 HOWARD Variable Pitch Propeller Patent |
| 1920 MUSANTE JOHN Propeller Patent Print Art |
| 1920 FRANK FOLEY Propeller Patent Print Art |
| 1920 HALL ELBERT Propeller Mounting Patent Print |
| 1920 BELDIN Adjustable Propeller Patent Print |
| 1920 GALLAGHER Propeller Patent Print Art |
| 1920 HERMANN FAEHRMANN Propeller Patent Print |
| 1920 SUMMERS Aeroplane Propeller Patent Print |
| 1920 LYONS ARTHUR Reversing Propeller Patent |
| 1920 EDWARD SIEVART Marine Propeller Patent |
| 1920 EDWARD Aeroplane Propeller Patent Print Art |
| 1920 VLADIMIR OLHOVSKY Propeller Patent Print |