Inventor · disambiguated record
Yoshito Tsunoda
Also filed as: SAWANO SUSUMU · TSUNODA YOSHITO
51 granted patents·1,559 citations·filing 1973–2018
99Inventor score
Top patents by PatentIndex Score
51 records- 0199US4949331AApparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatusHITACHI LTD·Filed 1986·Granted Aug 14, 1990·128 cites·13 claims
- 0297US4663751AOptical information processor for compensating offsetHITACHI LTD·Filed 1983·Granted May 5, 1987·58 cites·8 claims
- 0397US4085423AInformation reproducing apparatus with plural beam readoutHITACHI LTD·Filed 1976·Granted Apr 18, 1978·74 cites·14 claims
- 0495US4970707AOptical tape apparatus with a tracking control mechanism and/or a focusing control mechanismHITACHI LTD·Filed 1988·Granted Nov 13, 1990·64 cites·26 claims
- 0595US4622564AOptical information recording apparatusHITACHI LTD·Filed 1984·Granted Nov 11, 1986·51 cites·16 claims
- 0695US4450547AFocal position detecting optical apparatusHITACHI LTD·Filed 1981·Granted May 22, 1984·53 cites·20 claims
- 0795US4298974AOptical head for a videodisc player/recorderHITACHI LTD·Filed 1979·Granted Nov 3, 1981·52 cites·8 claims
- 0894US4283785AOptical information recording apparatusHITACHI LTD·Filed 1979·Granted Aug 11, 1981·49 cites·4 claims
- 0993US4725721AAutofocusing control systemHITACHI LTD·Filed 1985·Granted Feb 16, 1988·53 cites·13 claims
- 1091US5218599AMethod of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the methodHITACHI LTD·Filed 1989·Granted Jun 8, 1993·46 cites·18 claims
- 1190US5871881AMultilayer optical information mediumHITACHI LTD·Filed 1996·Granted Feb 16, 1999·71 cites·69 claims
- 1289US4554652AOptical information processorHITACHI LTD·Filed 1983·Granted Nov 19, 1985·37 cites·7 claims
- 1389US4293944AInformation play-back apparatus with astigmatic auto-focusingHITACHI LTD·Filed 1977·Granted Oct 6, 1981·31 cites·11 claims
- 1489US4163149AAutomatic focusing apparatusHITACHI LTD·Filed 1977·Granted Jul 31, 1979·33 cites·14 claims
- 1588US5025268AOptical scanning apparatus and asymmetrical aspheric scanning lensHITACHI LTD·Filed 1989·Granted Jun 18, 1991·65 cites·14 claims
- 1688US4742218AFocus error detection apparatus utilizing focusing an front and rear sides of focal planesHITACHI LTD·Filed 1986·Granted May 3, 1988·44 cites·13 claims
- 1788US4523089ADriving apparatus for semiconductor laserHITACHI LTD·Filed 1982·Granted Jun 11, 1985·36 cites·4 claims
- 1887US4532522AOptical recording apparatusHITACHI LTD·Filed 1982·Granted Jul 30, 1985·31 cites·18 claims
- 1987US4037919AHolographic device with divided object beams, a multicolor light source and direction-selective screenHITACHI LTD·Filed 1975·Granted Jul 26, 1977·43 cites·2 claims
- 2084US5084860AApparatus for optical disc memory with correction pattern and master disc cutting apparatusHITACHI LTD·Filed 1990·Granted Jan 28, 1992·31 cites·6 claims
- 2183US5073880AInformation recording/reproducing method and apparatusHITACHI LTD·Filed 1988·Granted Dec 17, 1991·28 cites·15 claims
- 2283US4807210AOptical information processing apparatusHITACHI LTD·Filed 1987·Granted Feb 21, 1989·28 cites·6 claims
- 2382US5109374ASmall-sized optical memory device and information processing apparatus utilizing cylindrically shaped information recording mediumHITACHI LTD·Filed 1989·Granted Apr 28, 1992·28 cites·21 claims
- 2481US4656618AOptical information recording and reproducing apparatusHITACHI LTD·Filed 1984·Granted Apr 7, 1987·22 cites·20 claims
- 2581US4525826AOptical track position detecting apparatus and optical information processor using the sameHITACHI LTD·Filed 1982·Granted Jun 25, 1985·22 cites·5 claims
- 2681US4021606AHologram apparatusHITACHI LTD·Filed 1975·Granted May 3, 1977·33 cites·10 claims
- 2780US4879703AMagneto-optic memory apparatus with defect detection of recording medium during erasing operationHITACHI LTD·Filed 1987·Granted Nov 7, 1989·25 cites·14 claims
- 2876US4308612AOptical information recording apparatus including error checking circuitHITACHI LTD·Filed 1979·Granted Dec 29, 1981·36 cites·14 claims
- 2975US4731771ATracking servo setting method and apparatusMAEDA TAKESHI·Filed 1986·Granted Mar 15, 1988·22 cites·16 claims
- 3074US5666598AImage forming method and apparatus using energy beam impingement on image forming particles to move the sameHITACHI LTD·Filed 1995·Granted Sep 9, 1997·24 cites·32 claims
- 3174US5574881AHigh capacity data storage method and system using independently controlled heads and circuitry for monitoring access frequency of data recordsHITACHI LTD·Filed 1995·Granted Nov 12, 1996·28 cites·6 claims
- 3272US4815058AOptical information processing apparatusHITACHI LTD·Filed 1986·Granted Mar 21, 1989·17 cites·14 claims
- 3367US4985616AOptical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus thereforHITACHI LTD·Filed 1988·Granted Jan 15, 1991·14 cites·16 claims
- 3467US4759628AWavelength scanning interferometry and interferometer employing laser diodeHITACHI LTD·Filed 1986·Granted Jul 26, 1988·25 cites·11 claims
- 3567US4301527AOptical head for a videodisc recorder/playerHITACHI LTD·Filed 1979·Granted Nov 17, 1981·12 cites·9 claims
- 3666US4733388AInformation recording discHITACHI MAXELL·Filed 1986·Granted Mar 22, 1988·14 cites·9 claims
- 3763US4835756AOptical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method thereforHITACHI LTD·Filed 1987·Granted May 30, 1989·12 cites·15 claims
- 3860US4051528AApparatus for optically reconstructing informationHITACHI LTD·Filed 1976·Granted Sep 27, 1977·16 cites·12 claims
- 3959US5572699AVariable length data in a parallel disk arrayHITACHI LTD·Filed 1993·Granted Nov 5, 1996·33 cites·30 claims
- 4057US4791650APhased-array semiconductor laser apparatusHITACHI LTD·Filed 1986·Granted Dec 13, 1988·11 cites·8 claims
- 4157US4550394ASystem for optically recording informationHITACHI LTD·Filed 1983·Granted Oct 29, 1985·9 cites·8 claims
- 4255US4802153AOptical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumpingHITACHI LTD·Filed 1986·Granted Jan 31, 1989·9 cites·20 claims
- 4351US5327371AInformation recording and reproducing apparatusHITACHI LTD·Filed 1992·Granted Jul 5, 1994·14 cites·24 claims
- 4450US4855991AOptical disk having track offset detection areasHITACHI LTD·Filed 1987·Granted Aug 8, 1989·6 cites·14 claims
- 4549US5404348AMethod for recording and reproducing information using at least two energy beamsHITACHI LTD·Filed 1990·Granted Apr 4, 1995·8 cites·29 claims
- 4641US4563760AMethod of detecting light spot control signalHITACHI LTD·Filed 1982·Granted Jan 7, 1986·4 cites·7 claims
- 4739US4953152AMastering machine for making an on-land recording master disk with two beam alignment servo loopsHITACHI LTD·Filed 1987·Granted Aug 28, 1990·4 cites·31 claims
- 4838US11619624B2Health facilitation system, sensor, and health facilitation methodFIRST SCREENING CO LTD·Filed 2018·Granted Apr 4, 2023·0 cites·23 claims
- 4937US4556965AInformation recording apparatus having automatic focusingHITACHI LTD·Filed 1981·Granted Dec 3, 1985·3 cites·18 claims
- 5034US12298988B2Server and information processing method for collecting human vital data and providing the data to usersFIRST SCREENING CO LTD·Filed 2018·Granted May 13, 2025·0 cites·20 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →