Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11247639 | Wiper blade rubber | Shuichi Ohtsubo, Yasuyuki Okamoto, Masaki Sakurai, Hiroaki Ohsako | 2022-02-15 |
| 6220982 | Idler pulley | Tadahisa Tanaka | 2001-04-24 |
| 5713809 | Chain tensioner and chain system | Ken Yamamoto, Katsuhisa Suzuki, Tsuyoshi Niwa | 1998-02-03 |
| 5702317 | Autotensioner | Sadaji Katogi, Yoshikazu Hida | 1997-12-30 |
| 5653651 | Hydraulic autotensioner | Tomoyoshi Egusa | 1997-08-05 |
| 5632474 | Compact hydraulic autotensioner with return spring mounted around a sleeve | Hisashi Hayakawa, Norio Yamazaki, Ken Yamamoto, Satoshi Kitano | 1997-05-27 |
| 5586952 | Hydraulic autotensioner | Tomoyoshi Izutsu | 1996-12-24 |
| 5482262 | Hydraulic autotensioner | Hisashi Hayakawa, Norio Yamazaki, Ken Yamamoto, Satoshi Kitano | 1996-01-09 |
| 5334109 | Belt tension adjusting device | Tomoyoshi Izutsu | 1994-08-02 |
| 5234385 | Belt tension adjusting device | Isao Hori, Tomoyoshi Izutsu | 1993-08-10 |
| 4986796 | Hydraulic autotensioner | Hisashi Hayakawa | 1991-01-22 |
| 4950209 | Autotensioner | Hisashi Hayakawa | 1990-08-21 |
| 4940447 | Autotensioner for adjusting the tension of a timing belt | Makoto Yasui, Hisashi Hayakawa, Masayuki Imoto | 1990-07-10 |
| 4904230 | Belt autotensioner | Hisashi Hayakawa | 1990-02-27 |