RN

Ryoichi Naganuma

HI Hitachi: 3 patents #10,712 of 28,497Top 40%
📍 Hitachinaka, JP: #1,128 of 2,447 inventorsTop 50%
Overall (All Time): #1,620,804 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6190285 Hydraulic control apparatus for an automatic transmission of a vehicle Toshimichi Minowa, Tatsuya Ochi 2001-02-20
5913747 Hydraulic control apparatus for an automatic transmission of a vehicle Toshimichi Minowa, Tatsuya Ochi 1999-06-22
5453972 Optical disk apparatus Hiroshi Kanazawa, Fumio Tajima, Nobuyoshi Mutoh, Tadashi Takahashi, Hideki Nihei +3 more 1995-09-26