| 1920 IMP Note Sheet Automatic Musical Instruments |
| 1920 CARLO Mute For Stringed Instruments Patent |
| 1920 LADISLAV Securing Means Ends Strings Instruments |
| 1920 LYON HEALY Trunk Harp Instruments Art Print |
| 1920 CHARLES String Musical Instruments Art |
| 1920 NEVILLE Hammer Pianos Similar Instruments |
| 1920 JAMESON Pneumatic Action Musical Instruments |
| 1920 CONN LTD C G Key Mount Wind Musical Instruments |
| 1920 FISHER Note Sheet Automatic Musical Instruments |
| 1920 OSCAR Playing Stringed Musical Instruments |
| 1920 CHARLES Playing Stringed Musical Instruments |
| 1920 BERNHARD Tuning Peg Stringed Instruments |
| 1920 MULLER Securing Means Ends Strings Instruments |
| 1920 GROVER Mute Carrier Stringed Musical Instruments |
| 1920 BETZ Music Roll Pneumatic Musical Instruments |
| 1920 FORTUNATO Mouthpiece Musical Instruments |
| 1920 COLMUS Hitch Pin Pianos Other String Instruments |
| 1920 CHARLES Bridge Violins Similar Musical Instruments |
| 1920 HUMES Appliance Horn Musical Instruments |
| 1920 KIRK Trunk Harp Instruments Art Print |
| 1920 TURNER Nut For Musical Instruments Patent |
| 1920 BERNHARD Fastener Tailpieces Musical Instruments |
| 1920 SINCLAIR Tuning Wind Musical Instruments |
| 1920 HARVARD Fingering Mechanism Wind Instruments |
| 1920 JOSEPH Sounding Board Musical Instruments |
| 1920 GULICK Key Mount Wind Musical Instruments |