Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11153999 | Work machine | — | 2021-10-19 |
| 4420067 | Friction member of resin mold type | Ryoichi Tomikawa, Masami Ishii | 1983-12-13 |
| 4416361 | Friction facings reinforced with stitching | Kiyohisa Suzuki, Ryoichi Tomikawa, Toshiaki Sakabe, Hiroshi Ban, Nobuyasu Ishida | 1983-11-22 |
| 4385682 | Motor vehicle clutch facing and friction property modifier therefor | Toshiaki Sakabe, Eiji Hamada | 1983-05-31 |
| 4364997 | Clutch facing material and method for manufacturing the same | Toshiaki Sakabe, Eizi Hamada | 1982-12-21 |
| 4262788 | Friction member of non-asbestos | Hiroshi Ban, Katumi Nakavishi, Katumi Nakanishi, Ryoichi Tomikawa, Toshitake Kato | 1981-04-21 |
| 4226816 | Method of manufacturing a clutch facing of the type used for automotive automatic transmissions | Mitsumasa Matsuo, Atsushi Nakagawa | 1980-10-07 |
| 4187133 | Method for manufacturing a clutch facing | Ryoichi Tomikawa, Toshiaki Sakabe, Yasuhiro Matsumoto | 1980-02-05 |