Issued Patents All Time
Showing 1–25 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11098769 | Clutch mechanism and piston | Kenji Niwata | 2021-08-24 |
| 10890217 | Hydraulic clutch device | Kenji Niwata | 2021-01-12 |
| 10801596 | Power transmission device | Kenji Niwata | 2020-10-13 |
| 10731714 | Power transmission apparatus | Fumiya Yoshida, Kenji Niwata, Eisuke Hosoda | 2020-08-04 |
| 10731746 | Power transmission apparatus | Kenji Niwata, Fumiya Yoshida, Eisuke Hosoda | 2020-08-04 |
| 10710462 | Driving device | Satoshi Ando, Yoshihito Kurizuka | 2020-07-14 |
| 10670088 | Hydraulic clutch device | Kenji Niwata | 2020-06-02 |
| 10663014 | Hydraulic clutch device | Kenji Niwata | 2020-05-26 |
| 10626926 | Power transmission apparatus and lubricating structure of power transmission apparatus | Sayako SATO | 2020-04-21 |
| 9239066 | Hydraulic controller of driving force distribution device | Yasuhiko Sugo, Ryuichi Murakami, Kenichiro Hayashi | 2016-01-19 |
| 4840842 | Abrasive tape | Masaaki Fujiyama, Masami Suzuki, Yasuyuki Yamada | 1989-06-20 |
| 4822672 | Abasive tape | Eiichi Tadokoro, Takahito Miyoshi | 1989-04-18 |
| 4767644 | Method of making abrasive tape | Masaaki Fujiyama, Masami Suzuki | 1988-08-30 |
| 4764423 | Abrasive tape | Eiichi Tadokoro | 1988-08-16 |
| 4756960 | Abrasive tape | Eiichi Tadokoro | 1988-07-12 |
| 4752524 | Abrasive tape | Eiichi Tadokoro | 1988-06-21 |
| 4734325 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Kazuko Hanai, Hideaki Kosha, Eiichi Tadokoro | 1988-03-29 |
| 4728569 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Kazuko Hanai, Hideaki Kosha, Eiichi Tadokoro | 1988-03-01 |
| 4696858 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Kazuko Hanai, Hideaki Kosha, Eiichi Tadokoro | 1987-09-29 |
| 4686139 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Kazuko Hanai, Hideaki Kosha, Eiichi Tadokoro | 1987-08-11 |
| 4663217 | Magnetic recording medium | Shinobu Iida, Masahiro Utsumi, Norio Nasu, Eiichi Tadokoro | 1987-05-05 |
| 4650720 | Magnetic recording medium | Takahito Miyoshi, Toshimitu Okutu, Noburo Hibino, Eiichi Tadokoro, Masaaki Fujiyama | 1987-03-17 |
| 4649072 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Kazuko Hanai, Hideaki Kosha, Eiichi Tadokoro | 1987-03-10 |
| 4647501 | Magnetic recording medium | Shinobu Iida, Norio Nasu, Katsumi Ryoke, Toshimitu Okutu, Kenichi Masuyama | 1987-03-03 |
| 4647503 | Magnetic recording medium including magnetic layer with carbon black particles and a fatty acid ester | Masaaki Fujiyama, Kazuo Kato, Akira Kashiwagi | 1987-03-03 |