Inventor · disambiguated record
Akio Yamakawa
Also filed as: YAMAKAWA AKIO
23 granted patents·4 pending applications·246 citations·filing 1981–2021
95Inventor score
Top patents by PatentIndex Score
27 records- 0184US6570828B2Optical pickup device having a movable-side member driven with a predetermined inclinationSONY CORP·Filed 2001·Granted May 27, 2003·21 cites·8 claims
- 0278US4780865AOptical information reproducing apparatus with tilt correction including projection and detection of a same diffusely illuminated fieldSONY CORP·Filed 1987·Granted Oct 25, 1988·23 cites·7 claims
- 0377US6366543B2Optical pickup for discriminating between and reading different types of optical discsSONY CORP·Filed 2001·Granted Apr 2, 2002·11 cites·6 claims
- 0475US5506830ADisk playerSONY CORP·Filed 1993·Granted Apr 9, 1996·27 cites·14 claims
- 0573US11590561B2Method of producing sand mold comprising curing a resin and a binder by the same curing agentDAIHATSU MOTOR CO LTD·Filed 2021·Granted Feb 28, 2023·1 cites·3 claims
- 0672US6222803B1Optical pickup for discriminating between and reading different types of optical discsSONY CORP·Filed 1996·Granted Apr 24, 2001·22 cites·24 claims
- 0771US8432591B2Light irradiation device for recording information in a hologram recording mediumYAMAKAWA AKIO·Filed 2010·Granted Apr 30, 2013·4 cites·11 claims
- 0871US5682372AMethod and apparatus for playing back multilayer diskSONY CORP·Filed 1996·Granted Oct 28, 1997·29 cites·13 claims
- 0970US5742575AMethod and device for identifying discSONY CORP·Filed 1996·Granted Apr 21, 1998·23 cites·6 claims
- 1069US11338394B2Laser processing apparatus, laser processing method and thin plate processed using the sameWIRED CO LTD·Filed 2018·Granted May 24, 2022·2 cites·10 claims
- 1168US4412320AReleasable cover locking deviceSONY CORP·Filed 1981·Granted Oct 25, 1983·13 cites·13 claims
- 1259US4896309AOptical disc player with phase shift dependent on disk rotation directionSONY CORP·Filed 1988·Granted Jan 23, 1990·11 cites·12 claims
- 1358USRE38538EApparatus and method for recording and reproducing information from a plurality of recording medium having different thicknesses and recording densitiesSONY CORP·Filed 2002·Granted Jun 22, 2004·3 cites·12 claims
- 1458US5737294AObjective lens with two numerical apertures for reading/writing two optical discsSONY CORP·Filed 1996·Granted Apr 7, 1998·13 cites·13 claims
- 1556US12085732B1Combined collimation and diffuser lens for flood illuminatorWAYMO LLC·Filed 2020·Granted Sep 10, 2024·0 cites·20 claims
- 1656US5875164AApparatus and method for recording and reproducing information from a plurality of recording medium having different thickness and recording densitiesSONY CORP·Filed 1996·Granted Feb 23, 1999·11 cites·12 claims
- 1755US2010182662A1Recording/reproduction method and hologram recording mediumSONY CORP·Filed 2009·Application pending·0 cites
- 1854US5963535ADisk reproducing apparatusSONY CORP·Filed 1995·Granted Oct 5, 1999·11 cites·8 claims
- 1951US6104688AObjective lens, reproducing apparatus and reproducing methodSONY CORP·Filed 1998·Granted Aug 15, 2000·11 cites·10 claims
- 2048US10139250B2Optical encoder based on light-steering based contrast generation from a first plurality of primary convex mirror sections and a second plurality of secondary mirror sectionsAPPLE INC·Filed 2016·Granted Nov 27, 2018·0 cites·22 claims
- 2148US2020188989A1Method for producing molding sand, and molding sandDAIHATSU MOTOR CO LTD·Filed 2018·Application pending·0 cites
- 2242US7995445B2Optical pickup apparatus, reproduction apparatus, and reproduction methodSONY CORP·Filed 2010·Granted Aug 9, 2011·0 cites·8 claims
- 2342US5751679AHologram formed on an objective lens for one defracting light beams which are separated by more than one track widthSONY CORP·Filed 1996·Granted May 12, 1998·6 cites·10 claims
- 2439US4779256AApparatus for detecting deviations from a mutually perpendicular condition between a disc and a light beamSONY CORP·Filed 1986·Granted Oct 18, 1988·4 cites·30 claims
- 2538US2010225985A1Reproducing device and reproducing methodSONY CORP·Filed 2010·Application pending·0 cites
- 2637US2010182663A1Light illuminating apparatus and light illuminating methodSONY CORP·Filed 2010·Application pending·0 cites
- 2734US8121010B2Hologram device, tilt detection method, and tilt correction methodYAMAKAWA AKIO·Filed 2010·Granted Feb 21, 2012·0 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →