Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10731712 | Friction plate | Ryo Ohashi | 2020-08-04 |
| 10502269 | Friction plate | Shahjada Ahmed Pahlovy, Akihito Oikawa, Ryo Ohashi | 2019-12-10 |
| 8216506 | Method of processing plant | Takashi Iizuka, Ryohei Kuramatsu | 2012-07-10 |
| 7005177 | Hard-faced friction mating member | Yuzuru Sanbongi, Shintaro Kameya | 2006-02-28 |
| 6029791 | Wet-type friction plate having small holes on the surface | — | 2000-02-29 |
| 5975267 | Unilateral disc-type friction clutch with thermal distortion avoidance feature | Yuzuru Sanbongi | 1999-11-02 |
| 5913395 | Single-faced disk type friction engagement device of equalized frictional surface temperature | Han Zhi-peng | 1999-06-22 |
| 5682971 | Friction plate for high oil passage and cooling | Han Zhi-peng | 1997-11-04 |
| 5660259 | Groove structure of wet-type friction engaging element | Han Peng | 1997-08-26 |
| 5335765 | Wet-type friction member with grooves shaped for improved oil film removing effect | Jin Takahashi | 1994-08-09 |