| 1920 G PIEL COMPANY INC Horn Patent Print Art |
| 1920 HORN SAMUEL Float For Boats Patent Print |
| 1920 ALBERT RYDBERG Diaphragm Horn Patent Print |
| 1920 LONG GEORGE Horn G PIEL COMPANY INC Patent |
| 1920 FITZGERALD Automobile Horn Patent Print Art |
| 1920 FITZGERALD MFG CO Automobile Horn Patent |
| 1920 WESTON Horn Shaping Device Patent Print Art |
| 1920 MANSON Automobile Or Motorcycle Horn Patent |
| 1920 HORN JEREMIAH Horseshoe Patent Print Art |
| 1920 ROADS SEABROOK Recording Horn Patent Print |
| 1920 SPARKS WITHINGTON CO Horn Patent Print Art |
| 1920 WILLIAM Horn Art Print Patent |
| 1920 AND Musical Horn Design Patent 9743 |
| 1920 LEET EDWARD Phonograph Horn Patent Print |
| 1920 SEISS Mechanically Operated Horn Patent |
| 1920 HARTMAN PETER Automobile Horn Patent Print |
| 1920 THOMPSON BRINKS Automobile Horn Patent |
| 1920 HARTDORN LOUIS Horn Patent Print Art |
| 1920 BUTLER AMES Electric Horn Patent Print Art |
| 1920 MELVILLE W MIX Recording Horn Patent Print |
| 1920 SEISS Mechanically Actuated Horn Patent |