Inventor
ISHIZUKA KOHEI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “ISHIZUKA KOHEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
11 patentsUS5479288ADec 26, 1995
Light transmission module
HITACHI LTD73 citations91
US4187479AFeb 5, 1980
Variable equalizer
HITACHI LTD55 citations91
US4477913AOct 16, 1984
Automatic equalizer apparatus
HITACHI LTD24 citations81
US4292596ASep 29, 1981
Gain control circuit
HITACHI LTD21 citations81
US4004253AJan 18, 1977
Variable equalizer
HITACHI LTD23 citations81
US4204176AMay 20, 1980
Variable equalizer
HITACHI LTD7 citations73
US4531089AJul 23, 1985
Electric power detecting circuit and gain control circuit using the same
HITACHI LTD16 citations72
US4122417AOct 24, 1978
Variable equalizer
HITACHI LTD12 citations72
US4080580AMar 21, 1978
Variable equalizer
HITACHI LTD9 citations72
US4097824AJun 27, 1978
Variable equalizer
HITACHI LTD2 citations62
US4101851AJul 18, 1978
Variable equalizer
HITACHI LTD1 citations51