Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300189 | Plasma surface treatment method and apparatus | Yuichi Kokaku, Yoshinori Honda | 1994-04-05 |
| 5275850 | Process for producing a magnetic disk having a metal containing hard carbon coating by plasma chemical vapor deposition under a negative self bias | Yuichi Kokaku, Makiko Itoh | 1994-01-04 |