Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5010692 | Polishing device | Takao Ishida, Hiroshi Hagiwara | 1991-04-30 |
| 4839992 | Polishing device | Takeo Ishida, Hiroshi Hagiwara | 1989-06-20 |
| 4837979 | Polishing device | Takao Ishida, Hiroshi Hagiwara | 1989-06-13 |