Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660581 | Grinding apparatus | Masafumi Tsunada, Yasuhiko Nagakura | 1997-08-26 |
| 5655954 | Polishing apparatus | Toshio Oishi, Masafumi Tsunada, Masahiro Ishida, Yasukazu Mase | 1997-08-12 |
| 5591071 | Polishing device | Masafumi Tsunada, Yasuhiko Nagakura, Toshio Oishi | 1997-01-07 |