Inventor · disambiguated record
Kazuo Shigematsu
Also filed as: INOSE FUMIYUKI · SHIGEMATSU KAZUO
69 granted patents·4 pending applications·1,982 citations·filing 1978–2005
99Inventor score
Top patents by PatentIndex Score
73 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
- 0297US5732061ARecording method using trial write test patternHITACHI LTD·Filed 1996·Granted Mar 24, 1998·114 cites·25 claims
- 0397US5642343AMagnetooptic disc apparatus and recording mediumHITACHI LTD·Filed 1992·Granted Jun 24, 1997·117 cites·17 claims
- 0497US4866687AOptical disc access method and optical disk storage using coarse and fine actuatorsHITACHI LTD·Filed 1988·Granted Sep 12, 1989·100 cites·12 claims
- 0597US4357616ARecording mediumHITACHI LTD·Filed 1980·Granted Nov 2, 1982·72 cites·13 claims
- 0696US6088307AWobble signal detecting circuit, wobble abnormality detecting circuit, information processing apparatus using these circuits and method and recording medium used in the apparatus or methodHITACHI LTD·Filed 1998·Granted Jul 11, 2000·129 cites·35 claims
- 0795US5590111AMethod of controlling recording of optical recordsHITACHI LTD·Filed 1993·Granted Dec 31, 1996·73 cites·10 claims
- 0895US5513165AMethod for controlling the farm of a magnetic domain of a magneto-optical disk using pre-write testingHITACHI LTD·Filed 1993·Granted Apr 30, 1996·90 cites·23 claims
- 0995US4646103AOptical recording methodHITACHI LTD·Filed 1986·Granted Feb 24, 1987·63 cites·4 claims
- 1093US5703855AOptical disk apparatus and recording and reading method for an optical disk using the sameHITACHI LTD·Filed 1994·Granted Dec 30, 1997·61 cites·7 claims
- 1192US5848045AMethod for recording and reading an optical diskHITACHI LTD·Filed 1997·Granted Dec 8, 1998·70 cites·14 claims
- 1291US4835759AMethod and apparatus for compensating variation of read data in an optical data storageHITACHI LTD·Filed 1986·Granted May 30, 1989·43 cites·5 claims
- 1390US5457666ALight modulation method for forming a mark in magneto-optical recording systemHITACHI LTD·Filed 1993·Granted Oct 10, 1995·53 cites·25 claims
- 1490US4637976AInformation recording memberHITACHI LTD·Filed 1984·Granted Jan 20, 1987·30 cites·3 claims
- 1587US4817053AApparatus for storing and retrieving information using an electron beamHITACHI LTD·Filed 1987·Granted Mar 28, 1989·35 cites·23 claims
- 1685US6785203B2Optical lens for optical disc drive with aberration suppression for recording/reproducing for a plurality of optical disc typesPENTAX CORP·Filed 2001·Granted Aug 31, 2004·20 cites·14 claims
- 1784US5084860AApparatus for optical disc memory with correction pattern and master disc cutting apparatusHITACHI LTD·Filed 1990·Granted Jan 28, 1992·31 cites·6 claims
- 1883US4807210AOptical information processing apparatusHITACHI LTD·Filed 1987·Granted Feb 21, 1989·28 cites·6 claims
- 1983US4788672AMethod and apparatus for controlling renewal of data in optical disc memoryHITACHI LTD·Filed 1986·Granted Nov 29, 1988·26 cites·23 claims
- 2083US4364118AOptical disk and optical information processorHITACHI LTD·Filed 1980·Granted Dec 14, 1982·24 cites·6 claims
- 2182US5553051AIncreased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the sameHITACHI LTD·Filed 1995·Granted Sep 3, 1996·39 cites·24 claims
- 2282US5031172AUnit and disc having a relatively rough surface and method of producingHITACHI MAXELL·Filed 1988·Granted Jul 9, 1991·27 cites·27 claims
- 2382US4751695AMethod and apparatus for tracking servo systemHITACHI LTD·Filed 1986·Granted Jun 14, 1988·27 cites·8 claims
- 2481US4819242ASemiconductor laser driver circuitHITACHI LTD·Filed 1986·Granted Apr 4, 1989·27 cites·11 claims
- 2581US4656618AOptical information recording and reproducing apparatusHITACHI LTD·Filed 1984·Granted Apr 7, 1987·22 cites·20 claims
- 2681US4525826AOptical track position detecting apparatus and optical information processor using the sameHITACHI LTD·Filed 1982·Granted Jun 25, 1985·22 cites·5 claims
- 2780US6791934B2Objective lens optical system, optical head and optical information reproduction apparatusHITACHI LTD·Filed 2002·Granted Sep 14, 2004·13 cites·7 claims
- 2880US5124967AAutomatic gain control method and apparatus in optical disk systemHITACHI LTD·Filed 1990·Granted Jun 23, 1992·41 cites·13 claims
- 2980US4879703AMagneto-optic memory apparatus with defect detection of recording medium during erasing operationHITACHI LTD·Filed 1987·Granted Nov 7, 1989·25 cites·14 claims
- 3079US6778486B1Laser module, optical head and optical information recording and reproducing apparatusHITACHI LTD·Filed 2000·Granted Aug 17, 2004·17 cites·13 claims
- 3176US6298028B1Optical head and information recording and reproducing apparatus using itHITACHI LTD·Filed 2000·Granted Oct 2, 2001·10 cites·8 claims
- 3275US4731771ATracking servo setting method and apparatusMAEDA TAKESHI·Filed 1986·Granted Mar 15, 1988·22 cites·16 claims
- 3374US6456579B1Method for recording information, apparatus for recording information, and information recording mediumHITACHI LTD·Filed 2000·Granted Sep 24, 2002·8 cites·14 claims
- 3474US5278813AOptical recording/reproducing apparatus with light beam deflection means including wedge-shaped prismHITACHI LTD·Filed 1992·Granted Jan 11, 1994·22 cites·8 claims
- 3574US4434429AInformation recording member and method of fabricating the sameHITACHI LTD·Filed 1981·Granted Feb 28, 1984·17 cites·40 claims
- 3672US7283671B2Communications terminalHITACHI LTD·Filed 2003·Granted Oct 16, 2007·17 cites·20 claims
- 3771US7148807B2Information transmission system and information transmission apparatusHITACHI LTD·Filed 2004·Granted Dec 12, 2006·15 cites·6 claims
- 3871US6836454B2Method and apparatus for reading and writing information onto and from information recording disksHITACHI LTD·Filed 2001·Granted Dec 28, 2004·8 cites·26 claims
- 3970US5953513ARecording and reproducing device for recording and reproducing information from different kinds of storage media having different sector formatsHITACHI LTD·Filed 1995·Granted Sep 14, 1999·57 cites·25 claims
- 4067US5105409AMethod and apparatus for optical recording and reproduction with tracking servo reducing track offsetHITACHI LTD·Filed 1988·Granted Apr 14, 1992·12 cites·11 claims
- 4167US4407880ASubstrate of member for recording information with light and method of manufacturing the sameHITACHI LTD·Filed 1980·Granted Oct 4, 1983·13 cites·15 claims
- 4267US4301527AOptical head for a videodisc recorder/playerHITACHI LTD·Filed 1979·Granted Nov 17, 1981·12 cites·9 claims
- 4366US5854778AInformation recording and reproducing method and system for disc-shaped recording mediumsHITACHI LTD·Filed 1994·Granted Dec 29, 1998·38 cites·13 claims
- 4466US4733388AInformation recording discHITACHI MAXELL·Filed 1986·Granted Mar 22, 1988·14 cites·9 claims
- 4565US6967919B2Method and apparatus for optical head and optical information reproducingHITACHI LTD·Filed 2003·Granted Nov 22, 2005·4 cites·13 claims
- 4664US6477129B2Optical disc driveHITACHI LTD·Filed 2001·Granted Nov 5, 2002·5 cites·20 claims
- 4763US7106681B1Optical head arrangements with single substrate lasersHITACHI LTD·Filed 2000·Granted Sep 12, 2006·4 cites·38 claims
- 4863US4835756AOptical 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
- 4962US4769311AInformation recording memberHITACHI LTD·Filed 1986·Granted Sep 6, 1988·10 cites·7 claims
- 5060US4743774AMethod and apparatus for optical detection of informationHITACHI LTD·Filed 1986·Granted May 10, 1988·11 cites·20 claims
Showing the top 50 of 73 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →