Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889650 | Synthetic traction fluid | Narihiko Yoshimura, Hirotaka Tomizawa | 1989-12-26 |
| 4886613 | Traction fluid | Narihiko Yoshimura, Hirotaka Tomizawa | 1989-12-12 |
| 4886614 | Synthetic traction fluid | Narihiko Yoshimura, Hirotaka Tomizawa | 1989-12-12 |