Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6972361 | Woodwind instrument equipped with pad sealing mechanism automatically adjustable to tone hole | Tsunehiko Fuse, Ichi Sugawara, Keisuke Tanaka | 2005-12-06 |
| 6642443 | Woodwind instrument with key mechanism perfectly closing holes | Shigeru Okada | 2003-11-04 |