| 1928 LOCKWOOD Tracker Mechanism Musical Instruments |
| 1928 MAXWELL Mute Violins Musical Instruments |
| 1928 JOHN Attachment Mouthpieces Musical Instruments |
| 1928 BROCKMAN Reed Musical Wind Instruments Art |
| 1928 HABEGER Attachment Musical Instruments Art |
| 1928 GEORGE Resonance Ring Stringed Musical Instruments |
| 1928 RUDOLPH Tracker Mechanism Musical Instruments |
| 1928 ALLEN Octave Key Mechanism Wood Wind Instruments |
| 1928 GEIB Case For Musical Instruments Patent |
| 1928 GEIB SCHAEFER CO Case Musical Instruments |
| 1928 THEODOR Playing Guitars Similar Instruments |
| 1928 GROVER Tuning Peg Stringed Musical Instruments |
| 1928 ALLEN Compound Key Mechanism Wood Wind Instruments |
| 1928 GIBSON Resonance Ring Stringed Musical Instruments |
| 1928 ANTHONY Key Pad For Wind Instruments Patent |
| 1928 ENGLISH Mute For Musical Instruments Patent |
| 1928 ALBERT Operating Means Musical Instruments |
| 1928 EDWIN Attachment Stringed Instruments Art |
| 1928 JULES Transposing Keyed Instruments Art |
| 1928 EUGENE Mouthpiece Musical Wind Instruments |
| 1928 REED Tone Arm Sound Reproducing Instruments |