Inventor · disambiguated record
Masayuki Usui
Also filed as: USUI MASAYUKI
25 granted patents·1 pending application·855 citations·filing 1984–2019
97Inventor score
Top patents by PatentIndex Score
26 records- 0197US4783155AOptical device with variably shaped optical surface and a method for varying the focal lengthCANON KK·Filed 1984·Granted Nov 8, 1988·140 cites·27 claims
- 0294US5347503AOptical information processing apparatus for correcting linearity of a photosensor output with respect to power of an emitted light beamCANON KK·Filed 1993·Granted Sep 13, 1994·54 cites·9 claims
- 0394US4714326AMethod and element for optical modulationCANON KK·Filed 1985·Granted Dec 22, 1987·98 cites·17 claims
- 0492US4872743AVarifocal optical elementCANON KK·Filed 1988·Granted Oct 10, 1989·92 cites·9 claims
- 0588US5404346AOptical information processing apparatus including a correction circuit for correcting non-linearity of an output of a position detection circuitCANON KK·Filed 1993·Granted Apr 4, 1995·31 cites·6 claims
- 0687US5532990AOptical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lensCANON KK·Filed 1995·Granted Jul 2, 1996·37 cites·6 claims
- 0785US4787075AOptical information recording medium and apparatus for recording/reproducing information using the sameCANON KK·Filed 1985·Granted Nov 22, 1988·32 cites·19 claims
- 0884US4781445AOptical device having positionally changeable optical surfaces and a method of varying an image forming positionCANON KK·Filed 1984·Granted Nov 1, 1988·39 cites·23 claims
- 0984US4729641AFunctional optical element having a non-flat planar interface with variable-index mediumCANON KK·Filed 1987·Granted Mar 8, 1988·55 cites·9 claims
- 1082US7995309B2Magnetic recording medium, magnetic signal reproduction method and magnetic signal reproduction systemFUJIFILM CORP·Filed 2008·Granted Aug 9, 2011·4 cites·6 claims
- 1181US5010534AOptical information recording-reproducing apparatusCANON KK·Filed 1989·Granted Apr 23, 1991·25 cites·7 claims
- 1281US4783141AArray lensCANON KK·Filed 1985·Granted Nov 8, 1988·42 cites·7 claims
- 1381US4712882AVariable focal length lensCANON KK·Filed 1984·Granted Dec 15, 1987·36 cites·8 claims
- 1479US5517475AOptical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signalCANON KK·Filed 1995·Granted May 14, 1996·24 cites·4 claims
- 1577US4848879ALight modulating deviceCANON KK·Filed 1987·Granted Jul 18, 1989·39 cites·19 claims
- 1673US5195081AOptical apparatus for effecting recording and/or reproducing of information on/from and optical information recording mediumCANON KK·Filed 1992·Granted Mar 16, 1993·21 cites·9 claims
- 1764US5861713ALow voltage electron beam display apparatus having brightness increased by reducing an oxide inevitably formed on a surface of an oxisulfide phosphor on manufactureNEC CORP·Filed 1997·Granted Jan 19, 1999·26 cites·16 claims
- 1860US4922351AOptical information recording and reproducing apparatusCANON KK·Filed 1988·Granted May 1, 1990·11 cites·29 claims
- 1956US4912697AApparatus and method for preventing recording errors due to a reduction in the relative speed between an information carrying light beam and a recording mediumCANON KK·Filed 1988·Granted Mar 27, 1990·9 cites·16 claims
- 2052US5247505AInformation recording method for reciprocally recording and verifying informationCANON KK·Filed 1992·Granted Sep 21, 1993·9 cites·4 claims
- 2151US12419523B2Sensor device, catheter, and system provided with sensor deviceSEMITEC CORP·Filed 2019·Granted Sep 23, 2025·0 cites·14 claims
- 2251US5119356AInformation recording and reproducing apparatus including detection of whether an information recording medium has been normally loaded into the apparatusCANON KK·Filed 1991·Granted Jun 2, 1992·8 cites·11 claims
- 2344US5018123AOptical information recording medium and method for recording information on said medium and reproducing information therefromCANON KK·Filed 1989·Granted May 21, 1991·9 cites·23 claims
- 2444US2006103961A1Digital recording and reproducing apparatus, recording medium used therefor, and error factor estimating method and error factor estimating system thereofFUJI PHOTO FILM CO LTD·Filed 2005·Application pending·0 cites
- 2540US4641920AOptical element having the function of changing the cross-sectional intensity distribution of a light beamCANON KK·Filed 1984·Granted Feb 10, 1987·8 cites·9 claims
- 2637US4865426AVariable aberration imaging optical systemCANON KK·Filed 1988·Granted Sep 12, 1989·6 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →