| 1931 SHERMAN Stringed Musical Instrument Patent |
| 1931 OSCAR SCHMIDT INC Stringed Musical Instrument |
| 1931 RICHARD Stringed Musical Instrument Patent |
| 1931 TRUJO Attachment Stringed Musical Instruments |
| 1931 PAGE Tailpiece Mute Stringed Musical Instruments |
| 1931 DANTE Stringed Musical Instrument Patent |
| 1931 CHARLES Stringed Musical Instrument Patent |
| 1931 PAULO Stringed Musical Instrument Patent |
| 1931 SAMUEL M STONE Stringed Musical Instrument |
| 1931 PAGE Mute Stringed Musical Instruments Art |
| 1931 RUDOLPH Stringed Musical Instrument Patent |
| 1931 KAUFMAN Stringed Musical Instrument Patent |
| 1931 GRIFFITH Sound Post Stringed Musical Instruments |
| 1931 TRUETT Attachment Stringed Musical Instruments |
| 1931 HENRY Steel Stringed Musical Instruments |
| 1931 LARGE Stringed Musical Instrument Patent |
| 1931 GEORGE RAMSEY Stringed Musical Instrument |
| 1931 WHEATLEY Stringed Musical Instrument Patent |
| 1931 INTERNAT MUSICAL CORP Stringed Musical Instrument |
| 1931 BEAUCHAMP Stringed Musical Instrument Art |
| 1931 BERRY Stringed Musical Instrument Patent |