Inventor · disambiguated record
Hiroshi Umezaki
Also filed as: UMEZAKI HIROSHI
36 granted patents·433 citations·filing 1974–2008
98Inventor score
Files withSUMITOMO CHEMICAL CO14HITACHI LTD11IBM8HITACHI GLOBAL STORAGE TECH1HITACHI GLOBAL STORAGE TECH NL1
Top patents by PatentIndex Score
36 records- 0194US5114437APolishing composition for metallic materialSUMITOMO CHEMICAL CO·Filed 1991·Granted May 19, 1992·51 cites·7 claims
- 0290US6826076B2Non-volatile memory deviceIBM·Filed 2002·Granted Nov 30, 2004·41 cites·14 claims
- 0386US7123498B2Non-volatile memory deviceIBM·Filed 2004·Granted Oct 17, 2006·30 cites·15 claims
- 0484US7518814B2Magnetic head tester and method of manufacturing magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Apr 14, 2009·6 cites·18 claims
- 0580US4584243AAbrasive, production thereof and use thereof in magnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1983·Granted Apr 22, 1986·18 cites·3 claims
- 0679US7349235B2Non-volatile memory deviceIBM·Filed 2006·Granted Mar 25, 2008·8 cites·11 claims
- 0778US7929255B2Magnetic head inspection system, magnetic head inspection method and magnetic disk drive manufacturing methodHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Apr 19, 2011·5 cites·34 claims
- 0876US8125734B2Magnetic slider, head gimbal assembly and method for manufacturing the sameUMEZAKI HIROSHI·Filed 2007·Granted Feb 28, 2012·6 cites·3 claims
- 0976US4288283AMethod of forming a microscopic patternHITACHI LTD·Filed 1980·Granted Sep 8, 1981·27 cites·9 claims
- 1075US4650895AProcess for producing high purity metallic compoundSUMITOMO CHEMICAL CO·Filed 1984·Granted Mar 17, 1987·10 cites·7 claims
- 1172US6639834B2Data register and access method thereofIBM·Filed 2002·Granted Oct 28, 2003·19 cites·15 claims
- 1271US5382556ATranslucent polycrystalline alumina and process for producing the sameSUMITOMO CHEMICAL CO·Filed 1993·Granted Jan 17, 1995·23 cites·6 claims
- 1368US4415262APhotomaskHITACHI LTD·Filed 1982·Granted Nov 15, 1983·28 cites·24 claims
- 1466US4460412AMethod of making magnetic bubble memory device by implanting hydrogen ions and annealingHITACHI LTD·Filed 1982·Granted Jul 17, 1984·14 cites·18 claims
- 1565US6785154B2MRAM and access method thereofIBM·Filed 2002·Granted Aug 31, 2004·14 cites·11 claims
- 1659US4740423AAbrasive, production thereof and use thereof in magnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1986·Granted Apr 26, 1988·9 cites·6 claims
- 1759US4704266AMethod for producing lithium aluminate powdersSUMITOMO CHEMICAL CO·Filed 1986·Granted Nov 3, 1987·16 cites·5 claims
- 1858US6992924B2Magnetic memory and method for optimizing write current in a magnetic memoryIBM·Filed 2003·Granted Jan 31, 2006·10 cites·20 claims
- 1956US7511981B2Non-volatile memory deviceIBM·Filed 2007·Granted Mar 31, 2009·2 cites·12 claims
- 2056US4671993AMagnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1985·Granted Jun 9, 1987·14 cites·8 claims
- 2155US4502916AProcess for forming fine patternsHITACHI LTD·Filed 1984·Granted Mar 5, 1985·19 cites·7 claims
- 2254US5757592ALaminated coil for a magnetic head of a disk drive and method for manufacturing the sameIBM·Filed 1996·Granted May 26, 1998·12 cites·19 claims
- 2349US4498931APigmented aluminum oxide powder and method of producing the sameSUMITOMO CHEMICAL CO·Filed 1983·Granted Feb 12, 1985·5 cites·10 claims
- 2449US4344153AMagnetic bubble memory device and method of fabricating the sameHITACHI LTD·Filed 1979·Granted Aug 10, 1982·5 cites·10 claims
- 2546US5348920Aθ-alumina powder, preparation thereof and magnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1993·Granted Sep 20, 1994·8 cites·8 claims
- 2644US5575964AMethod for producing silica-alumina fiberSUMITOMO CHEMICAL CO·Filed 1994·Granted Nov 19, 1996·8 cites·14 claims
- 2743US4556582AMethod of fabricating magnetic bubble memory deviceHITACHI LTD·Filed 1982·Granted Dec 3, 1985·5 cites·14 claims
- 2843US3954958APreparation of aluminum hydrateSUMITOMO CHEMICAL CO·Filed 1974·Granted May 4, 1976·5 cites·17 claims
- 2937US4503517AMagnetic bubble memory deviceHITACHI LTD·Filed 1983·Granted Mar 5, 1985·3 cites·4 claims
- 3035US4578775AMagnetic bubble memory deviceHITACHI LTD·Filed 1983·Granted Mar 25, 1986·1 cites·16 claims
- 3134US4262054AMagnetic bubble memory deviceHITACHI LTD·Filed 1979·Granted Apr 14, 1981·3 cites·12 claims
- 3233US5141807AMagnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1990·Granted Aug 25, 1992·3 cites·11 claims
- 3331US5616410AMagnetic recording mediumSUMITOMO CHEMICAL CO·Filed 1994·Granted Apr 1, 1997·3 cites·23 claims
- 3430US4772505AMagnetic bubble memory elementHITACHI LTD·Filed 1986·Granted Sep 20, 1988·1 cites·9 claims
- 3530US4755430AMagnetic bubble memory deviceHITACHI LTD·Filed 1987·Granted Jul 5, 1988·0 cites·6 claims
- 3624US5472468AExhaust gas filter elementSUMITOMO CHEMICAL CO·Filed 1994·Granted Dec 5, 1995·1 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →