Inventor

YANAGISAWA HIFUMI

JP9 patents

Patents

9 patents

US4293748AOct 6, 1981

Vacuum circuit interrupter electrodes

MEIDENSHA ELECTRIC MFG CO LTD7 citations73

US4434331AFeb 28, 1984

Vacuum power interrupting device

MEIDENSHA ELECTRIC MFG CO LTD14 citations72

US4429197AJan 31, 1984

Vacuum power interrupting device

MEIDENSHA ELECTRIC MFG CO LTD8 citations72

US4421961ADec 20, 1983

Vacuum circuit breaker

MEIDENSHA ELECTRIC MFG CO LTD7 citations72

US4417110ANov 22, 1983

Vacuum interrupter

MEIDENSHA ELECTRIC MFG CO LTD8 citations72

US4471184ASep 11, 1984

Vacuum interrupter

MEIDENSHA ELECTRIC MFG CO LTD13 citations70

US4465991AAug 14, 1984

Operating device for effecting opening and closing operation of a vacuum interrupter with an electromagnet incorporated therein

MEIDENSHA ELECTRIC MFG CO LTD2 citations61

US4450327AMay 22, 1984

Vacuum interrupter

MEIDENSHA ELECTRIC MFG CO LTD7 citations61

US3941960AMar 2, 1976

Vacuum power circuit breaker

MEIDENSHA ELECTRIC MFG CO LTD3 citations58