Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863657 | Method of making semi-conductor diffusion furnace components | Takashi Tanaka | 1989-09-05 |
| 4859385 | Method for making a furnace component | Takashi Tanaka | 1989-08-22 |
| 4816945 | Improved locking and ejection mechanism for magnetic disk pack recording and reproducing apparatus | — | 1989-03-28 |