Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856918 | Bearing device | Gentei Inoue, Katsuhiko Tanaka | 1989-08-15 |
| 4805972 | Dynamic pressure gas bearing device | Katsuhiko Tanaka, Takanobu Sato | 1989-02-21 |
| 4798476 | Dynamic pressure type fluid bearing | Katsuhiko Tanaka, Masaru Tamaki | 1989-01-17 |