Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7217305 | Polishing body | Kou Hasegawa, Osamu Ishikawa, Yukio Hosaka | 2007-05-15 |
| 7201641 | Polishing body | Kou Hasegawa, Osamu Ishikawa, Yukio Hosaka | 2007-04-10 |
| 7001252 | Abrasive material | Kou Hasegawa, Osamu Ishikawa, Yukio Hosaka | 2006-02-21 |