Inventor · disambiguated record
Toshihisa Deguchi
Also filed as: DEGUCHI TOSHIHISA
68 granted patents·1,286 citations·filing 1981–1998
99Inventor score
Top patents by PatentIndex Score
68 records- 0196US5420838ADisk recording and reproducing deviceSHARP KK·Filed 1993·Granted May 30, 1995·94 cites·20 claims
- 0296US5182741AOptical disk recording/reproducing device utilizing a constant angular velocity method with a constant linear velocity formatted optical diskSHARP KK·Filed 1990·Granted Jan 26, 1993·87 cites·32 claims
- 0393US4467383AMagnetooptic memory mediumSHARP KK·Filed 1981·Granted Aug 21, 1984·35 cites·19 claims
- 0492US5005164ARecording and reproducing apparatusSHARP KK·Filed 1988·Granted Apr 2, 1991·46 cites·17 claims
- 0592US4660190AOptical focus position control in optical disc apparatusSHARP KK·Filed 1983·Granted Apr 21, 1987·42 cites·19 claims
- 0690US4787076AOptical disc tracking system with switching of tracking error signals at boundary between track guide and track addressSHARP KK·Filed 1986·Granted Nov 22, 1988·37 cites·2 claims
- 0787US5477524AOptical memory medium with preformed pit arrangementSHARP KK·Filed 1994·Granted Dec 19, 1995·33 cites·6 claims
- 0887US4958337ADisk recording checking method for determining if a disk is defective by the number of errors presentSHARP KK·Filed 1989·Granted Sep 18, 1990·37 cites·7 claims
- 0987US4862443ASync signal detection apparatus for accurately synchronizing reproduced dataSHARP KK·Filed 1987·Granted Aug 29, 1989·34 cites·3 claims
- 1086US5432768AMethod and device for data management in optical recording mediumSHARP KK·Filed 1993·Granted Jul 11, 1995·33 cites·1 claims
- 1185US5278814AApparatus for recording and reproducing information on and from an optical diskSHARP KK·Filed 1990·Granted Jan 11, 1994·37 cites·13 claims
- 1284US5361247AInformation recording and reproducing device with reproduction and automatic gain control circuitSHARP KK·Filed 1990·Granted Nov 1, 1994·35 cites·29 claims
- 1383US4788674AOptical disc record reproducing apparatusSHARP KK·Filed 1986·Granted Nov 29, 1988·28 cites·8 claims
- 1483US4721368AOptical system in a magneto-optical memory deviceSHARP KK·Filed 1984·Granted Jan 26, 1988·23 cites·10 claims
- 1583US4573149AMagneto-optical head assembly with improved detection meansSHARP KK·Filed 1982·Granted Feb 25, 1986·32 cites·5 claims
- 1683US4414650AMagneto-optic memory elementSHARP KK·Filed 1981·Granted Nov 8, 1983·45 cites·4 claims
- 1779US5142521ARecording/reproducing deviceSHARP KK·Filed 1990·Granted Aug 25, 1992·28 cites·45 claims
- 1879US5001732ATrack counter for optical diskSHARP KK·Filed 1989·Granted Mar 19, 1991·22 cites·20 claims
- 1979US4843604ABeam controller for magneto-optical disc memory systemSHARP KK·Filed 1986·Granted Jun 27, 1989·21 cites·4 claims
- 2078US4920437ADisc clamping deviceSHARP KK·Filed 1987·Granted Apr 24, 1990·23 cites·4 claims
- 2177US5200941AOptical retrieval system for encoding pit angular data and optical recording element thereofSHARP KK·Filed 1989·Granted Apr 6, 1993·18 cites·3 claims
- 2277US4849953ATracking circuit for an optical information recording and reproducing apparatusSHARP KK·Filed 1986·Granted Jul 18, 1989·21 cites·9 claims
- 2376US5107473AOptical recording/reproducing device using permissible ranges for the value of an automatic gain control voltageSHARP KK·Filed 1990·Granted Apr 21, 1992·24 cites·11 claims
- 2476US5093820AOptical disk recording/reproducing deviceSHARP KK·Filed 1990·Granted Mar 3, 1992·24 cites·22 claims
- 2576US4778747AMethod of manufacturing optical memory elementSHARP KK·Filed 1987·Granted Oct 18, 1988·20 cites·10 claims
- 2676US4658390AOptical focus position control in an optical memory systemSHARP KK·Filed 1984·Granted Apr 14, 1987·22 cites·14 claims
- 2775US5301174AOptical disk recording and reproducing apparatusSHARP KK·Filed 1990·Granted Apr 5, 1994·24 cites·16 claims
- 2874US5274617AMethod and device for data management in an optical recording mediumSHARP KK·Filed 1990·Granted Dec 28, 1993·22 cites·21 claims
- 2974US5196978ACartridge caseSHARP KK·Filed 1987·Granted Mar 23, 1993·20 cites·12 claims
- 3071US5666345AOptical memory medium with predetermined guide tracks and prepitsSHARP KK·Filed 1994·Granted Sep 9, 1997·19 cites·15 claims
- 3168US5546364AMagneto-optical memory apparatus utilizing edges or recording mark to manage dataSHARP KK·Filed 1994·Granted Aug 13, 1996·17 cites·22 claims
- 3268US4935915ABeam controller for magneto-optical disc memory systemSHARP KK·Filed 1989·Granted Jun 19, 1990·13 cites·1 claims
- 3366US5170389ASemiconductor laser driving circuit with control circuit power voltage monitor for preventing inadvertent recordingSHARP KK·Filed 1990·Granted Dec 8, 1992·23 cites·8 claims
- 3466US4932013AApparatus for reading an optical disk which controls track jumping accurately and stablySHARP KK·Filed 1988·Granted Jun 5, 1990·14 cites·10 claims
- 3564US5571638ALithium secondary batterySUMITOMO CHEMICAL CO·Filed 1994·Granted Nov 5, 1996·38 cites·10 claims
- 3663US5107486AOptical memory device with grooves and pits in selected dimensional relationshipSHARP KK·Filed 1990·Granted Apr 21, 1992·13 cites·3 claims
- 3763US4920528AMethod of disk recording using alternative recording tracksSHARP KK·Filed 1987·Granted Apr 24, 1990·13 cites·3 claims
- 3862US5412630ATracking system for optical disc memory using tracking error signals from main beam and auxiliary beamsSHARP KK·Filed 1994·Granted May 2, 1995·11 cites·2 claims
- 3962US4925776AOptical memory element and manufacturing method thereofSHARP KK·Filed 1988·Granted May 15, 1990·10 cites·16 claims
- 4060US5331623AOptical retrieval system for encoding pit angular data and optical recording element thereforSHARP KK·Filed 1992·Granted Jul 19, 1994·10 cites·17 claims
- 4157US5084848AFeedback control apparatus in an optical recording and reproducing deviceSHARP KK·Filed 1989·Granted Jan 28, 1992·10 cites·7 claims
- 4257US4497006AMagneto-optic recording/playback head assemblySHARP KK·Filed 1982·Granted Jan 29, 1985·8 cites·4 claims
- 4352US5341362AOptical memory device having guide tracks shaped for increasing the quality of information signalsSHARP KK·Filed 1992·Granted Aug 23, 1994·8 cites·2 claims
- 4452US4782476AObjective lens-driving unitSHARP KK·Filed 1987·Granted Nov 1, 1988·8 cites·7 claims
- 4551US5010540AApparatus for recording and reproducing information on and from an optical diskSHARP KK·Filed 1988·Granted Apr 23, 1991·8 cites·5 claims
- 4650US5008888ASemiconductor laser driving apparatusSHARP KK·Filed 1989·Granted Apr 16, 1991·8 cites·5 claims
- 4749US4954903ADigital signal reproduction apparatus for reading magneto-optical disksSHARP KK·Filed 1988·Granted Sep 4, 1990·6 cites·3 claims
- 4849US4939710AOptical magnetic memory device utilizing non-recorded portions of recording medium to represent dataSHARP KK·Filed 1988·Granted Jul 3, 1990·7 cites·5 claims
- 4949US4881216AOptical head in an optical memory deviceSHARP KK·Filed 1988·Granted Nov 14, 1989·8 cites·16 claims
- 5049US4868922AData modulation/demodulation system utilizing demodulation clocks that differ in phaseSHARP KK·Filed 1987·Granted Sep 19, 1989·8 cites·4 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →