Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6547644 | Polishing pad | Takeyoshi Yamada, Hidetsugu Yoshida | 2003-04-15 |
| 6117521 | Concrete formwork | Hidetsugu Yoshida, Takeyoshi Yamada, Tadao Komoriya, Zenichiro Endo, Yuzo Aito +1 more | 2000-09-12 |