Katsunori Kuboyama

External auxiliary switch unit for circuit breakers

Takeshi Emura, Yoshinobu Hamada, Katsunori Kuboyama, 2004 .

Undervoltage tripping device with leading auxiliary switch for circuit breaker

Masao Miura, Koji Asakawa, Takeshi Emura, 2002 .

Break mechanism for automatic switches

Kentaro Toyama, Koji Asakawa, Tatsunori Takahashi, 2000 .

Breaker has two boxes

Katsunori Kuboyama, Hisao Kawata, Isamu Ohshima, 2003 .