Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478832 | Grinding stone, process for its production and grinding method employing it | Tsuyoshi Itsukaichi | 2002-11-12 |
| 5104421 | Polishing method of goods and abrasive pad therefor | Gisaburo Takizawa, Tetsushi Senda | 1992-04-14 |