| 1930 MORETON Attachment Musical Instruments Art |
| 1930 VINCENT String Musical Instruments Art |
| 1930 LEWIS Mute Brass Wind Musical Instruments |
| 1930 JOHNSON Attachment Fretted Musical Instruments |
| 1930 CALLIER Tailpiece Stringed Musical Instruments |
| 1930 HENRY Pitch Indicator Musical Instruments |
| 1930 NELSON Top Guitars Similar Stringed Instruments |
| 1930 BARKSTROM Pneumatic Coupler Musical Instruments |
| 1930 NUMA Pitch Indicator Musical Instruments |
| 1930 BRENNER Reed For Musical Instruments Patent |
| 1930 HARRY Attachment Stringed Musical Instruments |
| 1930 BLAIR Playing Stringed Instruments Art |
| 1930 FRANK HOLTON CO Reed Wind Musical Instruments |
| 1930 GULICK Key Pad Wind Musical Instruments Art |
| 1930 WAVERLY Tuning Peg Stringed Musical Instruments |
| 1930 PABICH Mouthpiece Wind Instruments Art |
| 1930 FREDERICK Bridge Stringed Musical Instruments |
| 1930 STANISLAUS Means Playing Musical Instruments |
| 1930 LANGE Frame For Musical Instruments Patent |
| 1930 SPARKES Tuning Peg Stringed Musical Instruments |
| 1930 RALPH Attachment Fretted Musical Instruments |
| 1930 PAUL Reed Wind Musical Instruments Art |
| 1930 HILL Polyphase Hammers Musical Instruments |
| 1930 BOOSEY LTD Mute Brass Wind Musical Instruments |
| 1930 J Pneumatic Coupler Musical Instruments Art |
| 1930 NEWTON Mouth Reed Musical Instruments Art |
| 1930 CONN LTD C G Key Pad Wind Musical Instruments |
| 1930 CALLIER String Fastening Musical Instruments |
| 1930 LA Key Mechanism Keyed Musical Instruments Like |
| 1930 FRIDOLF Sound Stringed Instruments Art |
| 1930 GRETSCH BRENNER INC Reed Musical Instruments |