Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D310082 | Seat belt microphone | Hari Matsuda | 1990-08-21 |
| 4490816 | Tonearm alignment gauge | — | 1984-12-25 |
| 4441177 | Stylus protection mechanism | Allen R. Groh | 1984-04-03 |
| 4270758 | Lever operated stylus guard for phonograph pick-up cartridge | — | 1981-06-02 |
| D258586 | Phonograph stylus | Robert L. Deschamps | 1981-03-17 |
| D257676 | Phonograph cartridge | Robert L. Deschamps | 1980-12-23 |