Inventor · disambiguated record
Toshimitsu Kaku
Also filed as: KAKU TOSHIMITSU
72 granted patents·4 pending applications·2,222 citations·filing 1981–2012
99Inventor score
Files withHITACHI LTD67HITACHI-LG DATA STORAGE INC2HITACHI CONSUMER ELECTRONICS1HITACHI LG STORAGE INC1HTACHI LTD1
Top patents by PatentIndex Score
76 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
- 0298US4866688AComposite tracking servo system for optical disc apparatus with track offset correctionHITACHI LTD·Filed 1986·Granted Sep 12, 1989·111 cites·20 claims
- 0397US5732061ARecording method using trial write test patternHITACHI LTD·Filed 1996·Granted Mar 24, 1998·114 cites·25 claims
- 0497US5642343AMagnetooptic disc apparatus and recording mediumHITACHI LTD·Filed 1992·Granted Jun 24, 1997·117 cites·17 claims
- 0597US4866687AOptical disc access method and optical disk storage using coarse and fine actuatorsHITACHI LTD·Filed 1988·Granted Sep 12, 1989·100 cites·12 claims
- 0697US4663751AOptical information processor for compensating offsetHITACHI LTD·Filed 1983·Granted May 5, 1987·58 cites·8 claims
- 0796US6088307AWobble 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
- 0895US5590111AMethod of controlling recording of optical recordsHITACHI LTD·Filed 1993·Granted Dec 31, 1996·73 cites·10 claims
- 0995US5513165AMethod 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
- 1095US4622564AOptical information recording apparatusHITACHI LTD·Filed 1984·Granted Nov 11, 1986·51 cites·16 claims
- 1195US4450547AFocal position detecting optical apparatusHITACHI LTD·Filed 1981·Granted May 22, 1984·53 cites·20 claims
- 1293US5703855AOptical 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
- 1392US6654328B2Information recording/reproducing apparatus with laser driverHITACHI LTD·Filed 2002·Granted Nov 25, 2003·27 cites·6 claims
- 1492US6442118B1Information recording and reproducing apparatus having semiconductor laser drive circuitry in its pickupHITACHI LTD·Filed 2000·Granted Aug 27, 2002·38 cites·15 claims
- 1592US5848045AMethod for recording and reading an optical diskHITACHI LTD·Filed 1997·Granted Dec 8, 1998·70 cites·14 claims
- 1691US5974021ADetermination of optimal recording power in optical disk recording and retrieving deviceHITACHI LTD·Filed 1997·Granted Oct 26, 1999·56 cites·9 claims
- 1790US6687208B2Laser drive integrated circuit and optical disk apparatus using the sameHITACHI LTD·Filed 2002·Granted Feb 3, 2004·24 cites·6 claims
- 1890US6487154B1Laser drive unit and information recording/reproducing apparatusHITACHI LTD·Filed 2000·Granted Nov 26, 2002·32 cites·10 claims
- 1990US6483791B1Laser drive integrated circuit and optical disk apparatus using the sameHITACHI LTD·Filed 1999·Granted Nov 19, 2002·52 cites·21 claims
- 2090US6414932B1Information recording/reproducing apparatus with laser driverHITACHI LTD·Filed 1999·Granted Jul 2, 2002·48 cites·3 claims
- 2190US5457666ALight modulation method for forming a mark in magneto-optical recording systemHITACHI LTD·Filed 1993·Granted Oct 10, 1995·53 cites·25 claims
- 2289US6721261B2Information recording/reproducing apparatus with laser driverHITACHI LTD·Filed 2002·Granted Apr 13, 2004·20 cites·10 claims
- 2388US6636472B2Laser drive unit and information recording/reproducing apparatusHITACHI LTD·Filed 2002·Granted Oct 21, 2003·26 cites·10 claims
- 2488US4742218AFocus error detection apparatus utilizing focusing an front and rear sides of focal planesHITACHI LTD·Filed 1986·Granted May 3, 1988·44 cites·13 claims
- 2587US6674702B2Laser drive integrated circuit and optical disk apparatus using the sameHITACHI LTD·Filed 2002·Granted Jan 6, 2004·18 cites·20 claims
- 2687US4532522AOptical recording apparatusHITACHI LTD·Filed 1982·Granted Jul 30, 1985·31 cites·18 claims
- 2784US5084860AApparatus for optical disc memory with correction pattern and master disc cutting apparatusHITACHI LTD·Filed 1990·Granted Jan 28, 1992·31 cites·6 claims
- 2883US6345023B1Optical disc apparatus with different frequencies of wobble signal and clock signal for rotation controlHITACHI LTD·Filed 1999·Granted Feb 5, 2002·39 cites·4 claims
- 2983US5629913AOptical disk recording control method and apparatus for recording user data based on test signalHITACHI LTD·Filed 1996·Granted May 13, 1997·43 cites·14 claims
- 3083US4807210AOptical information processing apparatusHITACHI LTD·Filed 1987·Granted Feb 21, 1989·28 cites·6 claims
- 3183US4730289AMagnetic-optical disc memory system and apparatus for switching header and data informationHITACHI LTD·Filed 1986·Granted Mar 8, 1988·27 cites·4 claims
- 3282US6246661B1Optical disk recording and retrieving deviceHITACHI LTD·Filed 2000·Granted Jun 12, 2001·12 cites·4 claims
- 3382US5497361AInformation reproducing apparatus with a DC level correcting capabilityHITACHI LTD·Filed 1993·Granted Mar 5, 1996·32 cites·12 claims
- 3482US4751695AMethod and apparatus for tracking servo systemHITACHI LTD·Filed 1986·Granted Jun 14, 1988·27 cites·8 claims
- 3581US4819242ASemiconductor laser driver circuitHITACHI LTD·Filed 1986·Granted Apr 4, 1989·27 cites·11 claims
- 3681US4656618AOptical information recording and reproducing apparatusHITACHI LTD·Filed 1984·Granted Apr 7, 1987·22 cites·20 claims
- 3781US4525826AOptical track position detecting apparatus and optical information processor using the sameHITACHI LTD·Filed 1982·Granted Jun 25, 1985·22 cites·5 claims
- 3880US4879703AMagneto-optic memory apparatus with defect detection of recording medium during erasing operationHITACHI LTD·Filed 1987·Granted Nov 7, 1989·25 cites·14 claims
- 3978US8305869B2Optical disc driveKITAYAMA AKIRA·Filed 2011·Granted Nov 6, 2012·5 cites·9 claims
- 4077US6954410B2Information recording and reproducing apparatus for updating the waveform of a laser based on position informationHITACHI LTD·Filed 2002·Granted Oct 11, 2005·10 cites·9 claims
- 4177US6810050B2Laser driver, optical disk apparatus using the same, and laser control methodHITACHI LTD·Filed 2001·Granted Oct 26, 2004·10 cites·14 claims
- 4275US5270987AMagneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium thereforHITACHI LTD·Filed 1990·Granted Dec 14, 1993·22 cites·53 claims
- 4374US6552987B1Optical disk apparatus wherein recording clock signal is stopped being supplied to semiconductor laser drive circuit on optical pickup during reproduction operationHITACHI LTD·Filed 1999·Granted Apr 22, 2003·25 cites·13 claims
- 4473US6747934B2Information recording/reproducing apparatus having verify control for recordingHITACHI LTD·Filed 2002·Granted Jun 8, 2004·6 cites·2 claims
- 4570US6493297B1Multibeam optical disk record and reproduction apparatus and methodHITACHI LTD·Filed 1993·Granted Dec 10, 2002·18 cites·18 claims
- 4668US5339319ARotary type storage apparatus and control method thereofHITACHI LTD·Filed 1991·Granted Aug 16, 1994·20 cites·6 claims
- 4767US6754144B1Optical information recording/reproducing apparatusHITACHI LTD·Filed 2000·Granted Jun 22, 2004·6 cites·14 claims
- 4867US5105409AMethod and apparatus for optical recording and reproduction with tracking servo reducing track offsetHITACHI LTD·Filed 1988·Granted Apr 14, 1992·12 cites·11 claims
- 4965US6301211B1Information recording/reproducing apparatusHITACHI LTD·Filed 1999·Granted Oct 9, 2001·12 cites·1 claims
- 5065US6295258B1Method for recording and reproducing information by pre-pits detectionHITACHI LTD·Filed 2000·Granted Sep 25, 2001·5 cites·8 claims
Showing the top 50 of 76 patent records by PatentIndex Score.
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