Inventor · disambiguated record
Yasuo Otsuka
Also filed as: OTSUKA YASUO
46 granted patents·4 pending applications·627 citations·filing 1987–2025
98Inventor score
Files withHITACHI LTD38KIOXIA CORP6HITACHI LTD AND HITACHI VIDEO1NEC ELECTRONICS CORP1RENESAS ELECTRONICS CORP1
Top patents by PatentIndex Score
50 records- 0198US6231191B1Image display mechanism and image display deviceHITACHI LTD·Filed 1998·Granted May 15, 2001·85 cites·12 claims
- 0295US6290360B1Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 1998·Granted Sep 18, 2001·59 cites·8 claims
- 0393US6299313B1Projection display apparatus and projection lens device for use thereinHITACHI LTD·Filed 2000·Granted Oct 9, 2001·52 cites·11 claims
- 0492US7021768B2Optical apparatusHITACHI LTD·Filed 2005·Granted Apr 4, 2006·11 cites·6 claims
- 0588US6431710B2Optical apparatusHITACHI LTD·Filed 2001·Granted Aug 13, 2002·23 cites·3 claims
- 0688US6280038B1Optical equipmentHITACHI LTD·Filed 1999·Granted Aug 28, 2001·66 cites·12 claims
- 0787US7175284B2Projection type display apparatusHITACHI LTD·Filed 2006·Granted Feb 13, 2007·6 cites·10 claims
- 0886US6783245B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 2001·Granted Aug 31, 2004·17 cites·4 claims
- 0986US6411440B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2000·Granted Jun 25, 2002·19 cites·16 claims
- 1082US5612940ADisc cartridge for receiving a disk and mechanism for preventing an incorrect insertion of a cartridgeHITACHI LTD·Filed 1993·Granted Mar 18, 1997·23 cites·83 claims
- 1180US5297133AOptical disc cartridge and mechanism for preventing an incorrect insertion of a cartridgeHITACHI LTD·Filed 1988·Granted Mar 22, 1994·17 cites·10 claims
- 1279US6682197B2Image display mechanism and image display deviceHITACHI LTD·Filed 2003·Granted Jan 27, 2004·9 cites·4 claims
- 1379US6542308B2Projection display apparatus and projection lens device for use thereinFiled 2001·Granted Apr 1, 2003·16 cites·6 claims
- 1478US6824273B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 2003·Granted Nov 30, 2004·9 cites·6 claims
- 1577US11037879B2Semiconductor deviceTOSHIBA MEMORY CORP·Filed 2019·Granted Jun 15, 2021·2 cites·16 claims
- 1677US6817720B2Image display mechanism and image display deviceHITACHI LTD·Filed 2003·Granted Nov 16, 2004·8 cites·4 claims
- 1776US7832871B2Optical equipment with at least first and second ventilation pathsHITACHI LTD·Filed 2008·Granted Nov 16, 2010·2 cites·10 claims
- 1876US7441904B2Projection type display apparatus with ventilationHITACHI LTD·Filed 2007·Granted Oct 28, 2008·2 cites·1 claims
- 1976US6392809B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2001·Granted May 21, 2002·10 cites·21 claims
- 2075US6908198B2Image display mechanism and image display deviceHITACHI LTD·Filed 2004·Granted Jun 21, 2005·7 cites·4 claims
- 2175US5859829ADisc apparatus for accepting a disc having at least one portion for preventing misinsertionHITACHI LTD·Filed 1995·Granted Jan 12, 1999·21 cites·2 claims
- 2274US6857749B2Projection type display apparatusHITACHI LTD·Filed 2002·Granted Feb 22, 2005·7 cites·6 claims
- 2374US6588910B2Image display mechanism and image display deviceHITACHI LTD·Filed 2001·Granted Jul 8, 2003·7 cites·7 claims
- 2470US6201645B1Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 1999·Granted Mar 13, 2001·21 cites·16 claims
- 2569US6741396B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2003·Granted May 25, 2004·6 cites·4 claims
- 2666US7571409B2Circuit design device and circuit design programNEC ELECTRONICS CORP·Filed 2006·Granted Aug 4, 2009·3 cites·5 claims
- 2766US6829031B2Liquid crystal display apparatus and optical device for use thereinHITACHI LTD·Filed 2003·Granted Dec 7, 2004·5 cites·2 claims
- 2865US6567218B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2002·Granted May 20, 2003·3 cites·16 claims
- 2964US7152978B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD AND HITACHI VIDEO·Filed 2004·Granted Dec 26, 2006·5 cites·10 claims
- 3063US4937801AMagneto-optical recording and reproducing apparatus with magnetic field controllerHITACHI LTD·Filed 1987·Granted Jun 26, 1990·13 cites·13 claims
- 3162US12347808B2Semiconductor deviceKIOXIA CORP·Filed 2022·Granted Jul 1, 2025·0 cites·13 claims
- 3261US5831967ACartridge for preventing misinsertionHITACHI LTD·Filed 1995·Granted Nov 3, 1998·11 cites·2 claims
- 3361US5805312AThermographical image copier system with real time copying and variable read and record speedsHITACHI LTD·Filed 1994·Granted Sep 8, 1998·22 cites·3 claims
- 3459US6256083B1Liquid crystal display apparatus and optical device for use thereinHITACHI LTD·Filed 1998·Granted Jul 3, 2001·19 cites·61 claims
- 3559US2024015991A1Memory deviceKIOXIA CORP·Filed 2023·Application pending·0 cites
- 3658US7327520B2Optical unit and image display apparatusHITACHI LTD·Filed 2006·Granted Feb 5, 2008·0 cites·9 claims
- 3758US6535267B2Liquid crystal display apparatus having liquid crystal display element immersed in cooling mediumHITACHI LTD·Filed 2001·Granted Mar 18, 2003·4 cites·4 claims
- 3856US11901337B2Semiconductor device and method of manufacturing the sameKIOXIA CORP·Filed 2021·Granted Feb 13, 2024·0 cites·15 claims
- 3954US7106518B2Optical unit and image display apparatusHITACHI LTD·Filed 2005·Granted Sep 12, 2006·0 cites·8 claims
- 4052US2025391819A1Semiconductor deviceKIOXIA CORP·Filed 2025·Application pending·0 cites
- 4152US2025391777A1Semiconductor deviceKIOXIA CORP·Filed 2025·Application pending·0 cites
- 4251US11437351B2Semiconductor deviceKIOXIA CORP·Filed 2021·Granted Sep 6, 2022·0 cites·6 claims
- 4350US5606547AOptical disc cartridge and mechanism for preventing an incorrect insertion of a cartridgeHITACHI LTD·Filed 1993·Granted Feb 25, 1997·5 cites·87 claims
- 4449US7979821B2Method of verifying semiconductor integrated circuit and design programRENESAS ELECTRONICS CORP·Filed 2008·Granted Jul 12, 2011·0 cites·12 claims
- 4549US6124979AProjection display apparatus and projection lens device for use thereinHITACHI LTD·Filed 1998·Granted Sep 26, 2000·10 cites·29 claims
- 4648US5452098AFacsimile apparatusHITACHI LTD·Filed 1993·Granted Sep 19, 1995·11 cites·7 claims
- 4746US6963453B2Optical unit and image display apparatusHITACHI LTD·Filed 2004·Granted Nov 8, 2005·0 cites·8 claims
- 4845US5548411AFacsimile apparatusHITACHI LTD·Filed 1995·Granted Aug 20, 1996·11 cites·6 claims
- 4944US6545812B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2002·Granted Apr 8, 2003·0 cites·2 claims
- 5043US2005001970A1Liquid crystal display apparatus and optical device for use thereinFiled 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →