Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4344503 | Diaphragm for electro-acoustic transducer | Akira Nakamura | 1982-08-17 |
| 4337379 | Planar electrodynamic electroacoustic transducer | — | 1982-06-29 |
| 4315557 | Diaphragm for electro-acoustic transducer | Akira Nakamura | 1982-02-16 |