Inventor · disambiguated record
Nobuo Sakuma
Also filed as: KAWAZU MOTOAKI · SAKUMA NOBUO
45 granted patents·3 pending applications·1,429 citations·filing 1975–2017
99Inventor score
Top patents by PatentIndex Score
48 records- 0199US7048388B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH KK·Filed 2004·Granted May 23, 2006·140 cites·24 claims
- 0296US7441908B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH KK·Filed 2006·Granted Oct 28, 2008·35 cites·9 claims
- 0396US3982116ASlit illumination system for copying machineRICOH KK·Filed 1975·Granted Sep 21, 1976·35 cites·8 claims
- 0495USRE45258EProjection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH CO LTD·Filed 2013·Granted Nov 25, 2014·14 cites·33 claims
- 0595US7938545B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH CO LTD·Filed 2010·Granted May 10, 2011·14 cites·7 claims
- 0695US7637621B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH KK·Filed 2008·Granted Dec 29, 2009·26 cites·5 claims
- 0795US7631975B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH KK·Filed 2008·Granted Dec 15, 2009·25 cites·6 claims
- 0893US7637618B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH KK·Filed 2008·Granted Dec 29, 2009·17 cites·7 claims
- 0993US5606181AEdge emitting type light emitting diode array headsRICOH KK·Filed 1995·Granted Feb 25, 1997·204 cites·41 claims
- 1091US7922341B2Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH CO LTD·Filed 2009·Granted Apr 12, 2011·13 cites·23 claims
- 1189US6292305B1Virtual screen display deviceRICOH KK·Filed 1998·Granted Sep 18, 2001·77 cites·36 claims
- 1289US5005928AOptical scanning systemRICOH KK·Filed 1989·Granted Apr 9, 1991·68 cites·26 claims
- 1388US4154500AExposure optical system for electrostatic copying machine or the likeRICOH KK·Filed 1977·Granted May 15, 1979·17 cites·11 claims
- 1487US4953171ASemiconductor laser source unitRICOH KK·Filed 1989·Granted Aug 28, 1990·39 cites·23 claims
- 1586US6545803B1Virtual screen display deviceRICOH KK·Filed 2001·Granted Apr 8, 2003·28 cites·12 claims
- 1683US5408095AOptical scanner having an image forming mirror and means for reducing scanning line pitch irregularitiesRICOH KK·Filed 1993·Granted Apr 18, 1995·59 cites·12 claims
- 1783US5233454AImage forming reflecting mirror for constant speed optical scan and optical scannerRICOH KK·Filed 1992·Granted Aug 3, 1993·58 cites·14 claims
- 1880US5426298AOptical scannerRICOH KK·Filed 1994·Granted Jun 20, 1995·50 cites·53 claims
- 1979USRE48309EProjection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusRICOH CO LTD·Filed 2017·Granted Nov 17, 2020·1 cites·26 claims
- 2078US4934772ALight beam scanning lens and light beam scanning deviceRICOH KK·Filed 1988·Granted Jun 19, 1990·37 cites·6 claims
- 2177USRE45728EProjection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusTAKAURA ATSUSHI·Filed 2013·Granted Oct 6, 2015·1 cites·32 claims
- 2275US4695132AFθ single lensRICOH KK·Filed 1982·Granted Sep 22, 1987·27 cites·13 claims
- 2374US5128795AScanning lens and scanning apparatus using scanning lensRICOH KK·Filed 1990·Granted Jul 7, 1992·39 cites·12 claims
- 2474US4932734AOptical scanning system using a laser diode arrayRICOH KK·Filed 1988·Granted Jun 12, 1990·32 cites·6 claims
- 2574US4571035ATwo-element fθ lens group capable of correcting leaning of deflecting planeRICOH KK·Filed 1982·Granted Feb 18, 1986·28 cites·7 claims
- 2673US4756585AOptical beam scanning systemRICOH KK·Filed 1986·Granted Jul 12, 1988·31 cites·52 claims
- 2770US4955682AScanning optical systemRICOH KK·Filed 1989·Granted Sep 11, 1990·27 cites·5 claims
- 2870US4943128ALight scanning deviceRICOH KK·Filed 1987·Granted Jul 24, 1990·24 cites·16 claims
- 2970US4712884ALens system for deflected light beamRICOH KK·Filed 1986·Granted Dec 15, 1987·34 cites·10 claims
- 3065US4770517ATwo-lens fθ lensRICOH KK·Filed 1985·Granted Sep 13, 1988·23 cites·6 claims
- 3164US4627685APost-objective type scanning deviceSAKUMA NOBUO·Filed 1984·Granted Dec 9, 1986·15 cites·4 claims
- 3263US7705868B2Light emitting array with improved characteristics, optical writing unit, and image forming apparatusRICOH KK·Filed 2004·Granted Apr 27, 2010·11 cites·37 claims
- 3363US5970034AMultiple-beam optical recording apparatusRICOH KK·Filed 1997·Granted Oct 19, 1999·21 cites·32 claims
- 3460US4436407AElectrophotographic reproduction of a three-dimensional objectRICOH KK·Filed 1982·Granted Mar 13, 1984·6 cites·8 claims
- 3559US5170278AReturn optical deflecting element, optical deflecting element and optical scannerRICOH KK·Filed 1991·Granted Dec 8, 1992·28 cites·13 claims
- 3658US4707085AFθ lens for use in light beam scannerRICOH KK·Filed 1986·Granted Nov 17, 1987·17 cites·6 claims
- 3756US5155616AScanning optical systemRICOH KK·Filed 1991·Granted Oct 13, 1992·19 cites·3 claims
- 3855US5729349AMethod and device for determining fiber orientation of paper, and apparatus for removing image forming substance from paperRICOH KK·Filed 1996·Granted Mar 17, 1998·9 cites·10 claims
- 3954US4758059APost-objective type optical deflectorRICOH KK·Filed 1985·Granted Jul 19, 1988·15 cites·1 claims
- 4054US4586782ALaser beam optical system with inclined cylindrical lensSAKUMA NOBUO·Filed 1983·Granted May 6, 1986·13 cites·7 claims
- 4153US5852499AMethod and device for determining fiber orientation of paper, and apparatus for removing image forming substance from paperRICOH KK·Filed 1997·Granted Dec 22, 1998·11 cites·34 claims
- 4253US2008304019A1Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatusTAKAURA ATSUSHI·Filed 2008·Application pending·0 cites
- 4353US2007285553A1Method and apparatus for image capturing capable of effectively reproducing quality image and electronic apparatus using the sameMORITA NOBUHIRO·Filed 2007·Application pending·0 cites
- 4451US5233455AScanning optical systemRICOH KK·Filed 1992·Granted Aug 3, 1993·15 cites·4 claims
- 4550US2012140097A1Method and apparatus for image capturing capable of effectively reproducing quality image and electronic apparatus using the sameMORITA NOBUHIRO·Filed 2011·Application pending·0 cites
- 4647US5157534AOptical scannerRICOH KK·Filed 1991·Granted Oct 20, 1992·11 cites·9 claims
- 4744US5373390AOptical scanning systemRICOH KK·Filed 1992·Granted Dec 13, 1994·10 cites·9 claims
- 4836US5666220AOptical scanner and polygon mirrorRICOH KK·Filed 1996·Granted Sep 9, 1997·5 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →