Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5581053 | Diaphragm of electroacoustic transducer and method of manufacturing the same | Yukimi Hiroshima, Kunihiko Ohbayashi | 1996-12-03 |
| 5480514 | Diaphragm of electroacoustic transducer and method of manufacturing thereof | — | 1996-01-02 |
| 5327507 | Headphone apparatus | — | 1994-07-05 |
| 4635750 | Loudspeaker diaphragm | — | 1987-01-13 |
| 4620606 | Loudspeaker of plane diaphragm type | — | 1986-11-04 |