Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866935 | Hydraulic torque converter | Masahiro Hayabuchi, Kazumasa Tsukamoto, Seitoku Kubo, Koujiro Kuramochi | 1989-09-19 |
| 4867262 | Four wheel drive system for vehicle | Mitsuru Takada, Hiroshi Itoh | 1989-09-19 |
| 4840247 | Device for controlling 4wd vehicle central differential restriction device according to front and rear wheels rotational speed difference, and method of operation thereof | Yuji Kashihara, Yutaka Tage, Yasunari Nakamura, Hiroshi Ito | 1989-06-20 |
| 4840263 | Hydraulic control device for 4WD torque distribution clutch providing stabilized pressure characteristics | Nobuyuki Kato, Hiroshi Itoh | 1989-06-20 |
| 4825368 | Device for controlling vehicle four wheel drive front/rear coupling device by learning effective front/rear vehicle wheels radius discrepancy, and method of operation thereof | Hiroshi Itoh | 1989-04-25 |