Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9153213 | Adjustable plectrum | — | 2015-10-06 |
| 7265285 | Plectrum with grip and method of manufacture | — | 2007-09-04 |
| 5648622 | Pick for a stringed musical instrument | — | 1997-07-15 |
| 4860628 | String supporting apparatus for stringed musical instruments | — | 1989-08-29 |
| 4742750 | Adjustable fine tuning bridge system and tremolo for stringed musical instruments | — | 1988-05-10 |
| 4667561 | Manual string lock with adjustable locking action | David J. Petschulat | 1987-05-26 |
| 4487100 | Adjustable musical bridge assembly | — | 1984-12-11 |
| 4457201 | Combined bridge and tailpiece assembly for a stringed musical instrument | — | 1984-07-03 |