Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7678977 | Repetition lever of grand piano | Kenji Yoshisue, Hirotaka Higasa | 2010-03-16 |
| 6660383 | Multifibrous carbon fiber and utilization thereof | Masahiro Toyoda, Yoshio Sohda, Yukinori Kude, Osamu Katou | 2003-12-09 |
| 5968435 | Process for manufacturing pitch-type carbon fiber | Osamu Kato, Yoshio Kishimoto, Yutaka Arai, Hajime Nakajima, Masatoshi Furuyama +5 more | 1999-10-19 |
| 5932820 | Damper lever for grand piano | — | 1999-08-03 |
| 5646359 | Silencing method and apparatus for pianos | Kiyoshi Abe | 1997-07-08 |
| 5528969 | Damper unit for a piano | Kiyoshi Abe | 1996-06-25 |
| 5470558 | Process for producing pitch-based carbon fibers superior in compression characteristics | Hiroaki Takashima, Osamu Kato | 1995-11-28 |
| 5192471 | Process for preparing carbon/carbon composite | Seiichi Uemura, Yoshio Sohda, Osamu Kato, Takefumi Kouno | 1993-03-09 |
| 5186873 | Process for preparing carbon/carbon composite | Seiichi Uemura, Yoshio Souda, Osamu Kato, Takefumi Kouno | 1993-02-16 |
| 5181979 | Process for preparing carbon/carbon composite | Seiichi Uemura, Yoshio Sohda, Osamu Kato, Takefumi Kouno | 1993-01-26 |