Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4437540 | Loud-speaker | Hiroshi Zyo | 1984-03-20 |
| 4391346 | Loud-speaker | Hiroshi Zyo | 1983-07-05 |
| 4311955 | Phase control device which compensates for input variations | — | 1982-01-19 |