Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6059926 | Method for manufacturing a paper diaphragm for a loud speaker | — | 2000-05-09 |
| 5581053 | Diaphragm of electroacoustic transducer and method of manufacturing the same | Akihisa Suzuki, Kunihiko Ohbayashi | 1996-12-03 |