Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862769 | Multiple disc clutch apparatus | Hidetaka Koga, Ikuo Kurosawa, Kouji Takahashi, Fumihiro Naoe, Motoi Takemura +1 more | 1989-09-05 |
| 4829799 | Method of manufacturing substrate for memory disk | Thomas U. Coe, Chris Krishnan | 1989-05-16 |
| 4825680 | Method of manufacturing metal substrates for disk for memory storage media | Thomas U. Coe | 1989-05-02 |
| 4823578 | Method of manufacturing substrate for memory disk | Thomas U. Coe, Chris Krishnan | 1989-04-25 |