Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889650 | Synthetic traction fluid | Hirotaka Tomizawa, Yasuji Komatsu | 1989-12-26 |
| 4886613 | Traction fluid | Yasuji Komatsu, Hirotaka Tomizawa | 1989-12-12 |
| 4886614 | Synthetic traction fluid | Hirotaka Tomizawa, Yasuji Komatsu | 1989-12-12 |
| 4871476 | Synthetic lubricating fluid | Michihide Tokashiki, Tetsuo Ishii | 1989-10-03 |