Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875987 | Grooved magnetic substrates and method for producing the same | Toshiaki Wada, Junichi Nakaoka | 1989-10-24 |
| 4859638 | Magnetic head sliders, materials therefor, and the process for the production thereof | Toshiaki Wada, Mitsuhiko Furukawa, Takashi Kitahira, Michito Miyahara, Kiyohito Misumi +1 more | 1989-08-22 |
| 4808455 | Magnetic recording disc and process for producing the same | Toshiaki Wada, Junichi Nakaoka | 1989-02-28 |