Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4716221 | 4'-demethyl-4-epipodophyllotoxin derivative | Hamao Umezawa, Tomio Takeuchi, Shinichi Kondo, Wataru Tanaka, Tomohisa Takita +1 more | 1987-12-29 |
| 4547567 | Derivatives of 4'-demethyl-4-epipodophyllotoxin | Hamao Umezawa, Tomio Takeuchi, Shinichi Kondo, Wataru Tanaka, Tomohisa Takita +1 more | 1985-10-15 |
| 4485907 | Three stage damper disc with increased support for side plates | — | 1984-12-04 |
| 4475640 | Damper disc | Hiroshi Takeuchi | 1984-10-09 |
| 4406357 | Damper disk | Tamio Nagano | 1983-09-27 |