Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802099 | Cleaning member and cylindrical cleaning element | Seigo Murakami, Hiroshi Ishii, Norio Yamada, Hidetoshi Nose | 2004-10-12 |
| 5985090 | Polishing cloth and polishing apparatus having such polishing cloth | Ritsuo Kikuta, Koji Kato, Tamami Takahashi | 1999-11-16 |
| 5643056 | Revolving drum polishing apparatus | Masayoshi Hirose, Seiji Ishikawa, Norio Kimura, Yoshimi Sasaki, Kouki Yamada +2 more | 1997-07-01 |