Inventor · disambiguated record
Sachio Koizumi
Also filed as: KOIZUMI SACHIO
24 granted patents·3 pending applications·157 citations·filing 1980–2005
95Inventor score
Top patents by PatentIndex Score
27 records- 0178US4286189AColor cathode ray tube with shadow mask having inwardly bent skirt portionsHITACHI LTD·Filed 1980·Granted Aug 25, 1981·19 cites·5 claims
- 0277US6624561B2Color cathode ray tube having an internal voltage-dividing resistorHITACHI LTD·Filed 2001·Granted Sep 23, 2003·13 cites·8 claims
- 0375US6366011B1Electron 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 metalHITACHI LTD·Filed 2000·Granted Apr 2, 2002·11 cites·20 claims
- 0472US6504293B1Cathode ray tube having an improved cathodeHITACHI LTD·Filed 2000·Granted Jan 7, 2003·11 cites·5 claims
- 0565US6515424B2Color cathode ray tube having an internal voltage-dividing resistorHITACHI LTD·Filed 2001·Granted Feb 4, 2003·6 cites·8 claims
- 0665US5808404AElectron tube including a cathode having an electron emissive material layerHITACHI LTD·Filed 1996·Granted Sep 15, 1998·19 cites·15 claims
- 0761US6552479B2Cathode ray tube having an improved heaterHITACHI LTD·Filed 2001·Granted Apr 22, 2003·5 cites·4 claims
- 0855US5216320ACathode for electron tubeHITACHI LTD·Filed 1991·Granted Jun 1, 1993·12 cites·14 claims
- 0954US6531813B1Cathode ray tube having an improved cathode structureHITACHI LTD·Filed 2000·Granted Mar 11, 2003·2 cites·11 claims
- 1053US7078851B2Cathode ray tubeHITACHI DISPLAYS LTD·Filed 2004·Granted Jul 18, 2006·2 cites·3 claims
- 1153US6335590B2Cathode ray tube having an indirectly heated cathode provided with a heater having a structure which substantially prevents cracks in an insulating coating thereofHITACHI LTD·Filed 2001·Granted Jan 1, 2002·2 cites·7 claims
- 1250US6614147B2Cathode ray tube having an improved indirectly heated cathode structureHITACHI LTD·Filed 2001·Granted Sep 2, 2003·2 cites·13 claims
- 1349US6191528B1Cathode ray tube having an improved indirectly heated cathodeHITACHI LTD·Filed 1998·Granted Feb 20, 2001·8 cites·7 claims
- 1448US5099170ACathode supporting structure for color cathode-ray tubeHITACHI LTD·Filed 1990·Granted Mar 24, 1992·8 cites·14 claims
- 1548US4886995AHeater for indirectly-heated cathodeHITACHI LTD·Filed 1986·Granted Dec 12, 1989·6 cites·6 claims
- 1646US6124667AElectron 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 metalHITACHI LTD·Filed 1998·Granted Sep 26, 2000·6 cites·29 claims
- 1745US5038071AHeater for indirectly-heated cathodeHITACHI LTD·Filed 1989·Granted Aug 6, 1991·6 cites·7 claims
- 1844US7176641B2Cathode ray tubeHITACHI DISPLAYS LTD·Filed 2005·Granted Feb 13, 2007·0 cites·6 claims
- 1939US2005206295A1Display deviceSUZUKI YUKIO·Filed 2005·Application pending·0 cites
- 2038US6492768B1Cathode ray tube having an improved indirectly heated cathodeHITACHI LTD·Filed 1999·Granted Dec 10, 2002·5 cites·7 claims
- 2138US5102363AManufacturing method of indirectly heated cathodeHITACHI LTD·Filed 1986·Granted Apr 7, 1992·3 cites·18 claims
- 2237US6724139B2Cathode ray tube having improved indirectly heated cathodeHITACHI LTD·Filed 2001·Granted Apr 20, 2004·0 cites·8 claims
- 2337US2003011294A1Cathode ray tube employing a cathode structure having improved gamma characteristicsFiled 2002·Application pending·0 cites
- 2436US2004007954A1Cathode ray tubeFiled 2003·Application pending·0 cites
- 2535US4745325AHeater for indirect-heated cathodeHITACHI LTD·Filed 1985·Granted May 17, 1988·4 cites·6 claims
- 2634US6130499ACathode ray tube having an improved cathode structureHITACHI LTD·Filed 1998·Granted Oct 10, 2000·2 cites·5 claims
- 2732US4844942AMethod of producing dark heaterHITACHI LTD·Filed 1986·Granted Jul 4, 1989·5 cites·34 claims
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