Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5781642 | Speaker system | Shoji Tanaka | 1998-07-14 |
| 5588065 | Bass reproduction speaker apparatus | Shoji Tanaka, Satoshi Kageyama | 1996-12-24 |
| 5372677 | Method of manufacturing semiconductor devices | Satoshi Katayama, Kenichi Nitta | 1994-12-13 |