NY

Norio Yamakawa

HI Hitachi: 3 patents #10,712 of 28,497Top 40%
HC Hitachi Chemical Company: 3 patents #513 of 1,946Top 30%
📍 Ibaraki, JP: #2,661 of 6,779 inventorsTop 40%
Overall (All Time): #1,683,744 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4409508 Brush holder with coated clamp for dynamo-electric machine Norihiro Ooki, Noriyoshi Takahashi, Yasuyuki Wachi, Yoshio Takikawa, Shoji Motegi 1983-10-11
4355254 Brush holding device for electric rotary machine Norihiro Oki, Shoji Motegi, Yasuyuki Wachi, Yoshio Takikawa 1982-10-19
4296346 Brush holding apparatus for rotary electric machine Norihiro Ooki, Shoji Motegi, Yasuyuki Wachi, Yoshio Takikawa 1981-10-20