Inventor · disambiguated record
Kazuhiro Umeki
Also filed as: UMEKI KAZUHIRO
12 granted patents·1 pending application·104 citations·filing 1991–2010
89Inventor score
Top patents by PatentIndex Score
13 records- 0183US8178010B2Optical device and method of producing the sameHIRAI HIDEAKI·Filed 2010·Granted May 15, 2012·6 cites·2 claims
- 0273US8830585B2Optical element, polarization filter, optical isolator, and optical apparatusHIRAI HIDEAKI·Filed 2010·Granted Sep 9, 2014·4 cites·6 claims
- 0373US7697395B2Optical device, method of producing the same, optical pickup, and optical information processing deviceRICOH KK·Filed 2005·Granted Apr 13, 2010·2 cites·17 claims
- 0472US5830605AGradation mask method of producing the same and method of forming special surface profile on material using gradation maskRICOH OPTICAL IND CO·Filed 1996·Granted Nov 3, 1998·44 cites·25 claims
- 0568US7195732B2Method and mold for fabricating article having fine surface structureRICOH OPTICAL IND CO·Filed 2003·Granted Mar 27, 2007·9 cites·25 claims
- 0662US7894133B2Optical element and optical deviceRICOH CO LTD·Filed 2007·Granted Feb 22, 2011·3 cites·12 claims
- 0761US8154976B2Reflecting wavelength plate and optical pickup using reflecting wavelength plateHIRAI HIDEAKI·Filed 2009·Granted Apr 10, 2012·0 cites·3 claims
- 0860US5368908AOptical information recording mediumRICOH KK·Filed 1991·Granted Nov 29, 1994·24 cites·12 claims
- 0949US8259555B2Optical pickup and optical information processing deviceHAMANO YUKIKO·Filed 2008·Granted Sep 4, 2012·0 cites·13 claims
- 1046US8154977B2Reflecting wavelength plate and optical pickup using reflecting wavelength plateHIRAI HIDEAKI·Filed 2010·Granted Apr 10, 2012·0 cites·2 claims
- 1145US5776639AExposure mask, method of producing the same, exposure mask producing apparatus, and method of forming surface profile on material using exposure maskRICOH OPTICAL IND CO·Filed 1996·Granted Jul 7, 1998·12 cites·6 claims
- 1240US7502300B2Optical pickup and optical data processing apparatusRICOH KK·Filed 2004·Granted Mar 10, 2009·0 cites·11 claims
- 1338US2004174596A1Polarization optical device and manufacturing method thereforRICOH OPTICAL IND CO·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →