Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5866636 | Non-asbestos friction material | Tatsuya Sano, Seigou Sakagami, Masanori Ibuki, Hiroya Kishimoto | 1999-02-02 |
| 4743635 | Friction material and method of making such material | Mitsuhiko Nakagawa | 1988-05-10 |
| 4678818 | Friction material and method of making such material | Mitsuhiko Nakagawa | 1987-07-07 |
| 4672082 | Friction material using steel fibers | Mitsuhiko Nakagawa | 1987-06-09 |
| 4665108 | Friction material using iron powder | Mitsuhiko Nakagawa | 1987-05-12 |