Inventor
KOIZUMI SACHIO
JP24 patents
⚠️ This page may combine multiple inventors who share the name “KOIZUMI SACHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
22 patentsUS5808404ASep 15, 1998
Electron tube including a cathode having an electron emissive material layer
HITACHI LTD19 citations91
US6624561B2Sep 23, 2003
Color cathode ray tube having an internal voltage-dividing resistor
HITACHI LTD13 citations84
US4286189AAug 25, 1981
Color cathode ray tube with shadow mask having inwardly bent skirt portions
HITACHI LTD19 citations82
US5099170AMar 24, 1992
Cathode supporting structure for color cathode-ray tube
HITACHI LTD8 citations73
US4886995ADec 12, 1989
Heater for indirectly-heated cathode
HITACHI LTD6 citations73
US6504293B1Jan 7, 2003
Cathode ray tube having an improved cathode
HITACHI LTD11 citations72
US6366011B1Apr 2, 2002
Electron gun for cathode-ray tube for image display having an electrode with reduced electron beam passage hole and a cathode with an electron emissive layer mainly made of an oxide of an alkaline earth metal and containing an oxide of a rare earth metal
HITACHI LTD11 citations72
US6191528B1Feb 20, 2001
Cathode ray tube having an improved indirectly heated cathode
HITACHI LTD8 citations72
US6124667ASep 26, 2000
Electron gun for a cathode-ray tube for image display having an electrode with a reduced electron beam limiting hole and a cathode with an electron emissive layer mainly made of an oxide of an alkaline metal and containing an oxide of a rare earth metal
HITACHI LTD6 citations72
US5216320AJun 1, 1993
Cathode for electron tube
HITACHI LTD12 citations71
US6515424B2Feb 4, 2003
Color cathode ray tube having an internal voltage-dividing resistor
HITACHI LTD6 citations63
US5102363AApr 7, 1992
Manufacturing method of indirectly heated cathode
HITACHI LTD3 citations62
US4745325AMay 17, 1988
Heater for indirect-heated cathode
HITACHI LTD4 citations62
US6614147B2Sep 2, 2003
Cathode ray tube having an improved indirectly heated cathode structure
HITACHI LTD2 citations61
US6552479B2Apr 22, 2003
Cathode ray tube having an improved heater
HITACHI LTD5 citations61
US6531813B1Mar 11, 2003
Cathode ray tube having an improved cathode structure
HITACHI LTD2 citations61
US6335590B2Jan 1, 2002
Cathode ray tube having an indirectly heated cathode provided with a heater having a structure which substantially prevents cracks in an insulating coating thereof
HITACHI LTD2 citations61
US6130499AOct 10, 2000
Cathode ray tube having an improved cathode structure
HITACHI LTD2 citations61
US6492768B1Dec 10, 2002
Cathode ray tube having an improved indirectly heated cathode
HITACHI LTD5 citations59
US5038071AAug 6, 1991
Heater for indirectly-heated cathode
HITACHI LTD6 citations59
US4844942AJul 4, 1989
Method of producing dark heater
HITACHI LTD5 citations59
US6724139B2Apr 20, 2004
Cathode ray tube having improved indirectly heated cathode
HITACHI LTD0 citations41