RS

Ryuzo Sakakiyama

SU Subaru: 53 patents #3 of 1,436Top 1%
VB Van Doorne'S Transmissie B.V.: 3 patents #23 of 89Top 30%
Overall (All Time): #49,598 of 4,157,543Top 2%
53
Patents All Time

Issued Patents All Time

Showing 1–25 of 53 patents

Patent #TitleCo-InventorsDate
6698541 Driving force distributing apparatus for a vehicle 2004-03-02
6634451 Power distribution control system for a vehicle 2003-10-21
6604595 Driving force distributing apparatus for a vehicle 2003-08-12
6564139 Apparatus and method for controlling a four-wheel drive vehicle 2003-05-13
5890991 Control system and method of continuously variable transmission 1999-04-06
5655408 Failure detecting system and method for automatic transmission Kiminaga Shirakawa, Kazunari Tezuka 1997-08-12
5601510 Failure detecting system and method for automatic transmission Kiminaga Shirakawa, Kazunari Tezuka 1997-02-11
5591101 Failure detecting system and method for automatic transmission Kiminaga Shirakawa, Kazunari Tezuka 1997-01-07
5573475 Failure detecting system and method for automatic transmission Kiminaga Shirakawa, Kazunari Tezuka 1996-11-12
5486147 Failure detecting system and method for automatic transmission Kiminaga Shirakawa, Kazunari Tezuka 1996-01-23
4913270 Control system for an automatic transmission of a motor vehicle with an antilock brake system Hideki Ishido, Hiroshi Tsukagoshi, Katsumasa Igarashi, Takayuki Ushijima, Mitsuo Umezawa 1990-04-03
4911275 System for controlling a clutch for a vehicle Hiroya Ohkumo 1990-03-27
4848528 Control system for an electromagnetic clutch for a vehicle Hiroya Ohkumo 1989-07-18
4848544 Control system for a clutch for a vehicle Hiroya Ohkumo 1989-07-18
4836322 Power transmission system for a four-wheel drive vehicle 1989-06-06
4834226 Control system for an electromagnetic clutch for a vehicle Hiroya Ohkumo 1989-05-30
4831896 Line pressure control system for an automatic transmission 1989-05-23
4829852 Control system for an automatic transmission 1989-05-16
4830155 Control system for a clutch for a vehicle Hiroya Ohkumo 1989-05-16
4823925 Control system for a clutch for a vehicle Hiroya Ohkumo 1989-04-25
4805751 System for controlling a clutch for a motor vehicle Hiroya Ohkumo 1989-02-21
4804059 System for controlling a transfer clutch of a four-wheel drive vehicle 1989-02-14
4730711 Electromagnetic clutch control system for automobiles 1988-03-15
4723644 Electromagnetic clutch control system for automobiles 1988-02-09
4711317 System for controlling a transfer clutch of a four-wheel drive vehicle 1987-12-08