| 1930 SCHMIDT Stringed Musical Instrument Patent |
| 1930 BEYER HERBERT Musical Instrument Patent |
| 1930 MARX HENRY Musical Instrument Patent Print |
| 1930 JANSSEN Musical Instrument Case Patent |
| 1930 HASTEROK Musical Instrument Holder Patent |
| 1930 OVERTON Musical Instrument Patent Print Art |
| 1930 MORSE Sound Reproducing Instrument Patent |
| 1930 PRICE Reproducing Musical Instrument Patent |
| 1930 EDMOND Automatic Musical Instrument Patent |
| 1930 CADIEUX Electrical Patting Instrument Patent 32762 |
| 1930 CURTIS Stringed Musical Instrument Patent |
| 1930 LEONARD String Musical Instrument Patent |
| 1930 PARKINSON Musical Instrument Patent Print |
| 1930 KIRK Stringed Musical Instrument Patent |
| 1930 MORIZ Keyboard Music Instrument Patent |
| 1930 EMERICH Electric Music Instrument Patent |
| 1930 GULICK Music Wind Instrument Key Pad Patent 17286 |
| 1930 JOHN Stringed Musical Instrument Patent |
| 1930 CHARLTON Wind Musical Instrument Patent |
| 1930 PATTERSON Musical Instrument Patent Print |
| 1930 GEORGES Musical Instrument Patent Print Art |
| 1930 LEONARD Stringed Musical Instrument Patent |
| 1930 ROBB Sound Reproducing Instrument Patent 21273 |
| 1930 LOGAN RIVES Wind Instrument Patent Print |
| 1930 BLESSING Brass Wind Instrument Patent Print |
| 1930 ZIMMERMAN Musical Instrument FULLEN Patent 25512 |
| 1930 J C DEAGAN INC Musical Instrument Patent |
| 1930 LIEBICH Percussion Type Instrument Patent |
| 1930 ZAK Range Finding Instrument Patent Print |
| 1930 JARVIS Horological Instrument Patent Print |
| 1930 HARRY Musical Wind Instrument Patent Print |
| 1930 PARKER JR Musical Instrument Patent Print |
| 1930 VASEY JOSEPH Musical Instrument Patent |
| 1930 DYTCH Musical Wind Instrument Patent 17284 |
| 1930 TRUETT VELMA Musical Instrument Patent |