ST

Shunji Tokuyama

HI Hitachi: 4 patents #8,942 of 28,497Top 35%
Overall (All Time): #1,290,895 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5543597 Grounding switch gear device Atsuji Watanabe, Youichi Ohshita, Masatomo Ohno, Masanori Tsukushi 1996-08-06
4618905 DC circuit breaker Koji Suzuki, Keiji Arimatsu 1986-10-21
4578730 High-voltage DC circuit breaker apparatus Kooji Suzuki, Kunio Hirasawa, Yoshio Yoshioka, Keiji Arimatsu 1986-03-25
4216513 D.C. Circuit breaker Hiroyuki Sugawara 1980-08-05