Inventor · disambiguated record
Kunikazu Ohnishi
Also filed as: OHNISHI KUNIKAZU
39 granted patents·14 pending applications·570 citations·filing 1986–2020
97Inventor score
Files withHITACHI LTD25HITACHI MEDIA ELECTRON KK9OHNISHI KUNIKAZU6HATAGI MICHIO1HITACHI CONSUMER ELECTRONICS1
Top patents by PatentIndex Score
53 records- 0192US6567355B2Optical detector, optical pickup and optical information reproducing apparatus using optical pickupHITACHI LTD·Filed 2000·Granted May 20, 2003·31 cites·7 claims
- 0291US5555334AOptical transmission and receiving module and optical communication system using the sameHITACHI LTD·Filed 1994·Granted Sep 10, 1996·121 cites·22 claims
- 0389US6400664B1Optical head including electrical circuit which produces focus error signal and tracking error signal unaffected by variations in intensity distributions of reflected light beamsHITACHI LTD·Filed 1999·Granted Jun 4, 2002·48 cites·6 claims
- 0487US7327661B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2003·Granted Feb 5, 2008·14 cites·3 claims
- 0586US7706220B2Photodetector, diffraction grating, optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2006·Granted Apr 27, 2010·6 cites·11 claims
- 0686US6125087AOptical pickup for optical disk apparatusHITACHI LTD·Filed 1997·Granted Sep 26, 2000·50 cites·6 claims
- 0785US4768183AOptical reproducing apparatusHITACHI LTD·Filed 1987·Granted Aug 30, 1988·31 cites·7 claims
- 0883US4783776AMethod of recording and reproducing digital information and apparatus thereforHITACHI LTD·Filed 1986·Granted Nov 8, 1988·30 cites·6 claims
- 0982US6721242B2Optical detector having three light receiving areasHITACHI LTD·Filed 2002·Granted Apr 13, 2004·14 cites·18 claims
- 1082US5493554A2-laser optical head and recording/reproducing apparatusHITACHI LTD·Filed 1993·Granted Feb 20, 1996·33 cites·9 claims
- 1180US7590043B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2007·Granted Sep 15, 2009·2 cites·2 claims
- 1279US5541909AOptical disc with phase pits and a reproducing apparatus for data recorded on the optical discHITACHI LTD·Filed 1993·Granted Jul 30, 1996·27 cites·15 claims
- 1378US6507009B1Optical detector, signal processing circuit and optical information reproduction apparatus thereofHITACHI LTD·Filed 1999·Granted Jan 14, 2003·27 cites·1 claims
- 1476US6934228B2Optical headHITACHI LTD·Filed 2004·Granted Aug 23, 2005·8 cites·3 claims
- 1576US5751680AOptical disk driveHITACHI LTD·Filed 1996·Granted May 12, 1998·28 cites·11 claims
- 1675US7965594B2Optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2010·Granted Jun 21, 2011·3 cites·8 claims
- 1775US6778475B2Optical detector, optical pickup and optical information reproducing apparatus using optical pickup for detecting at least three light beams separated from one or more light sourcesHITACHI LTD·Filed 2002·Granted Aug 17, 2004·8 cites·7 claims
- 1875US6728173B2Information reproducing method which reproduces plural components of a focus error signal and a tracking error signal from plural detection regions of plural reflected light beamsHITACHI LTD·Filed 2002·Granted Apr 27, 2004·8 cites·3 claims
- 1975US5404344ARecording/reproducing optical head producing focusing error signal from zero-th order diffracted light and tracking error signal from first order diffracted lightHITACHI LTD·Filed 1993·Granted Apr 4, 1995·23 cites·12 claims
- 2074US5278813AOptical recording/reproducing apparatus with light beam deflection means including wedge-shaped prismHITACHI LTD·Filed 1992·Granted Jan 11, 1994·22 cites·8 claims
- 2169US5930220ATracking method for optical disk apparatus using diffraction lightHITACHI LTD·Filed 1996·Granted Jul 27, 1999·22 cites·4 claims
- 2264US7911915B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2007·Granted Mar 22, 2011·0 cites·1 claims
- 2363US7724626B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2007·Granted May 25, 2010·0 cites·2 claims
- 2463US7697394B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2007·Granted Apr 13, 2010·0 cites·8 claims
- 2563US7697393B2Optical pickup and optical information recording apparatus using the sameHITACHI LTD·Filed 2007·Granted Apr 13, 2010·0 cites·9 claims
- 2663US7480216B2Optical information recording apparatusHITACHI MEDIA ELECTRON KK·Filed 2004·Granted Jan 20, 2009·4 cites·3 claims
- 2761US8693075B2Scan type image display deviceNAKAO TAKESHI·Filed 2012·Granted Apr 8, 2014·2 cites·5 claims
- 2860US8072850B2Optical information recording apparatusISSHIKI FUMIO·Filed 2009·Granted Dec 6, 2011·0 cites·8 claims
- 2956US2007242575A1Optical Pickup and Optical Disc ApparatusNAKAMURA TOSHITERU·Filed 2007·Application pending·0 cites
- 3055US7715298B2Optical pickup and optical information reproducing apparatus using sameHITACHI MEDIA ELECTRON KK·Filed 2006·Granted May 11, 2010·0 cites·20 claims
- 3154US8149678B2Diffraction grating, optical pickup and optical disc deviceOHNISHI KUNIKAZU·Filed 2009·Granted Apr 3, 2012·0 cites·4 claims
- 3254US8081550B2Optical pickup deviceOHNISHI KUNIKAZU·Filed 2009·Granted Dec 20, 2011·0 cites·6 claims
- 3351US7656771B2Optical pickup and optical disc driveHITACHI MEDIA ELECTRON KK·Filed 2006·Granted Feb 2, 2010·0 cites·14 claims
- 3449US5404348AMethod for recording and reproducing information using at least two energy beamsHITACHI LTD·Filed 1990·Granted Apr 4, 1995·8 cites·29 claims
- 3549US2006193217A1Optical pickup and optical information reproducing deviceMORI HIROMITSU·Filed 2005·Application pending·0 cites
- 3648US7936658B2Photodetector, diffraction grating, optical pickup and optical disc apparatusHITACHI MEDIA ELECTRON KK·Filed 2010·Granted May 3, 2011·0 cites·11 claims
- 3748US2010124161A1Optical pickup and optical information reproducing deviceHITACHI MEDIA ELECTRON KK·Filed 2010·Application pending·0 cites
- 3848US2010124153A1Optical pickup and optical information reproducing deviceHITACHI MEDIA ELECTRON KK·Filed 2010·Application pending·0 cites
- 3947US10851014B2Device for applying release agent to glass bottle finishing mold, method for applying release agent to glass bottle finishing mold, device for manufacturing glass bottle, and method for manufacturing glass bottleNIHON YAMAMURA GLASS CO LTD·Filed 2020·Granted Dec 1, 2020·0 cites·17 claims
- 4047US9551917B2Light source unit and projection display system using sameHITACHI CONSUMER ELECTRONICS·Filed 2013·Granted Jan 24, 2017·0 cites·2 claims
- 4147US8891147B2Optical beam scanning device and image display device using the sameOHNISHI KUNIKAZU·Filed 2012·Granted Nov 18, 2014·0 cites·8 claims
- 4247US8331207B2Optical pickup and optical disc unitIZUMI KATSUHIKO·Filed 2008·Granted Dec 11, 2012·0 cites·8 claims
- 4345US2006193219A1Diffraction grating, optical pickup device, and optical disk apparatusKAWAMURA TOMOTO·Filed 2006·Application pending·0 cites
- 4445US2003080274A1Optical detector, optical pickup and optical information reproducing apparatus using optical pickupFiled 2002·Application pending·0 cites
- 4545US2014036242A1Optical scanning apparatus and optical scanning image projection apparatusHITACHI MEDIA ELECTRON KK·Filed 2013·Application pending·0 cites
- 4643US2013076800A1Scanning projection apparatus and scanning image displayHATAGI MICHIO·Filed 2012·Application pending·0 cites
- 4741US2012293775A1Scanning type projectorKITA HIROMI·Filed 2012·Application pending·0 cites
- 4841US2013003022A1Scan-type image display device and scan-type projection deviceTANAKA TEPPEI·Filed 2012·Application pending·0 cites
- 4940US8644120B2Optical information processing device and tracking control method thereof for use with grooveless multilayer optical discOHNISHI KUNIKAZU·Filed 2012·Granted Feb 4, 2014·0 cites·4 claims
- 5040US2004052509A1Optical pick-up device and optical disk apparatusHITACHI LTD·Filed 2003·Application pending·0 cites
Showing the top 50 of 53 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →