Inventor
NAKANO SEIZO
19 patents
Patents
19 patentsUS6407900B1Jun 18, 2002
Lightning protection system for wind power generation installation
HITACHI LTD41 citations92
US5498849AMar 12, 1996
Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor
HITACHI LTD23 citations91
US5444206AAug 22, 1995
Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor
HITACHI LTD34 citations91
US4009458AFeb 22, 1977
Puffer type gas circuit breaker
HITACHI LTD50 citations90
US4215256AJul 29, 1980
Gas-insulated switchgear apparatus
HITACHI LTD20 citations81
US4403125ASep 6, 1983
Gas-insulated disconnecting switch
HITACHI LTD19 citations78
US4045634AAug 30, 1977
Gas insulated switch-gear apparatus
HITACHI LTD21 citations78
US4032820AJun 28, 1977
Horizontal double plane high voltage switching assembly
HITACHI LTD28 citations78
US4354220AOct 12, 1982
Gas insulated power switch-gear apparatus
HITACHI LTD13 citations74
US4237520ADec 2, 1980
Gas insulated switch-gear apparatus
HITACHI LTD16 citations73
US4207446AJun 10, 1980
Grounded tank type gas circuit breaker
HITACHI LTD13 citations73
US3941963AMar 2, 1976
Circuit breaker
HITACHI LTD11 citations73
US4570202AFeb 11, 1986
Gas-insulated switchgear equipment
HITACHI LTD16 citations72
US4675773AJun 23, 1987
Transmission line protection system
HITACHI LTD16 citations71
US4321651AMar 23, 1982
Enclosed-type zinc-oxide surge arrester
HITACHI LTD9 citations71
US4587592AMay 6, 1986
Zinc oxide lightning protector
HITACHI LTD15 citations70
US4658329AApr 14, 1987
Gas-insulated switchgear apparatus
HITACHI LTD8 citations69
US4263491AApr 21, 1981
Method for checking electric contacts of an enclosed-type switching device and an auxiliary apparatus for use with the switching device to use the method
HITACHI LTD4 citations62
US3943777AMar 16, 1976
Operating apparatus for circuit breaker
HITACHI LTD4 citations61