Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4552243 | Diaphragm material for acoustical transducer | Tsutomu Haga, Iwao Sashida | 1985-11-12 |
| 4461930 | Acoustic transducer with honeycomb diaphragm | Tsutomu Haga, Iwao Sashida | 1984-07-24 |