FY

Fumiyuki Yamaoka

AU Atsugi Unisia: 24 patents #1 of 117Top 1%
HS Hitachi Automotive Systems: 13 patents #88 of 1,636Top 6%
AC Atsugi Motor Parts Company: 9 patents #1 of 93Top 2%
UJ Unisia Jecs: 4 patents #74 of 395Top 20%
HA Hitachi Astemo: 2 patents #393 of 1,276Top 35%
HA Hitachi Unisia Automotive: 1 patents #26 of 62Top 45%
HI Hitachi: 1 patents #17,742 of 28,497Top 65%
Overall (All Time): #45,648 of 4,157,543Top 2%
55
Patents All Time

Issued Patents All Time

Showing 26–50 of 55 patents

Patent #TitleCo-InventorsDate
5316113 Hydraulic shock absorber 1994-05-31
5293969 Electromagnetic suspension device Mitsuo Sasaki 1994-03-15
5277283 Variable damping-characteristics shock absorber with adjustable orifice construction variable of fluid flow restriction depending upon fluid pressure difference Issei Kanari 1994-01-11
5263558 Electromagnetic strut assembly 1993-11-23
5261448 Vibration mode responsive variable damping force shock absorber with feature of automatic selection of damping mode depending upon vibration mode of vehicular body Takayuki Furuya 1993-11-16
5246092 Vehicle hydraulic shock absorber having low friction seal 1993-09-21
5242038 Variable damping force shock absorber 1993-09-07
5219414 Variable damping force shock absorber with stroke dependent variation characteristics of damping force 1993-06-15
5200895 Automotive suspension system with enhanced response characteristics Junichi Emura, Shinobu Kakizaki, Mitsuo Sasaki, Hiroyuki Shimizu 1993-04-06
5193655 Variable damping force shock absorber with feature of linear and wide range damping force variation depending upon piston stroke speed Mitsuo Sasaki, Shinobu Kakizaki, Hiroyuki Shimizu 1993-03-16
5186043 Load sensor Shinobu Kakizaki 1993-02-16
5180129 Suspension strut construction Mitsuo Sasaki, Chiharu Nakazawa, Hiroyuki Sugiyama 1993-01-19
5163660 Sensor arrangement of vibration isolation apparatus Shinobu Kakizaki 1992-11-17
5158161 Reverse installation type variable damping force shock absorber variable of damping characteristics both for bounding and rebounding stroke motions Shinobu Kakizaki, Mitsuo Sasaki, Hiroyuki Shimizu, Junichi Emura 1992-10-27
5133434 Variable damping force shock absorber with feature of independent adjustment of damping characteristics for bounding a rebounding strokes Shigeru Kikushima 1992-07-28
5133574 Variable damping characteristics suspension system for automotive suspension system with variable damping characteristics shock absorber with input vibration frequency dependent variation characteristics Shinobu Kakizaki, Shigeru Kikushima 1992-07-28
5129488 Vibration mode responsive variable damping force shock absorber with feature of automatic selection of damping mode depending upon vibration mode of vehicular body Takayuki Furuya 1992-07-14
5115892 Hydraulic shock absorber with piston seal structure for enhancement of initial response Junichi Emura, Takayuki Furuya 1992-05-26
5088760 Semi-active suspension control system with reduced switching frequency in hard and soft suspension characteristics Shinobu Kakizaki, Mitsuo Sasaki, Hiroyuki Shimizu, Junichi Emura 1992-02-18
5086649 Mounting structure for load sensor in automotive suspension system 1992-02-11
5054809 Variable damping characteristics shock absorber Shinobu Kakizaki, Shigeru Kikushima 1991-10-08
5042624 Hydraulic shock absorber with pre-loaded valve for linear variation characteristics of damping force Takayuki Furuya 1991-08-27
4989701 Shock absorber Tamotsu Yamaura 1991-02-05
4984819 Automotive suspension system and shock absorber therefor Shinobu Kakizaki, Shigeru Kikushima, Junichi Emura 1991-01-15
4964493 Shock absorber with variable damping characteristics depending upon stroke speed Tamotsu Yamaura, Mitsuo Sasaki 1990-10-23