Inventor · disambiguated record
Yasuyuki Tejima
Also filed as: TEJIMA YASUYUKI
37 granted patents·803 citations·filing 1977–2009
98Inventor score
Top patents by PatentIndex Score
37 records- 0198US5274406AImage projecting deviceASAHI OPTICAL CO LTD·Filed 1991·Granted Dec 28, 1993·106 cites·30 claims
- 0296US4936657AProjection type liquid-crystal video display device using a fresnel lensASAHI OPTICAL CO LTD·Filed 1986·Granted Jun 26, 1990·129 cites·25 claims
- 0394US4771308AAuxiliary light projecting apparatus for a focus detecting systemASAHI OPTICAL CO LTD·Filed 1987·Granted Sep 13, 1988·94 cites·35 claims
- 0492US5442413APupil conjugate-coupling device in projecting optical systemASAHI OPTICAL CO LTD·Filed 1993·Granted Aug 15, 1995·127 cites·39 claims
- 0589US5005968AContrast decreasing apparatus in image forming optical systemASAHI OPTICAL CO LTD·Filed 1989·Granted Apr 9, 1991·32 cites·24 claims
- 0683US4918476AStill cameraASAHI OPTICAL CO LTD·Filed 1988·Granted Apr 17, 1990·19 cites·42 claims
- 0777US7548378B2Zoom lens and projector using zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted Jun 16, 2009·8 cites·20 claims
- 0877US5272570AIlluminating reflection apparatusASAHI OPTICAL CO LTD·Filed 1991·Granted Dec 21, 1993·42 cites·21 claims
- 0976US5283599AApparatus for combining and projecting imagesASAHI OPTICAL CO LTD·Filed 1992·Granted Feb 1, 1994·40 cites·14 claims
- 1073US7545581B2Zoom lens and projector unitCASIO COMPUTER CO LTD·Filed 2007·Granted Jun 9, 2009·4 cites·10 claims
- 1172US7529034B2Zoom lens and projector using zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted May 5, 2009·6 cites·20 claims
- 1272US5038162AStill cameraASAHI OPTICAL CO LTD·Filed 1990·Granted Aug 6, 1991·14 cites·44 claims
- 1370US7486450B2Lens system and projector utilizing the sameCASIO COMPUTER CO LTD·Filed 2007·Granted Feb 3, 2009·5 cites·20 claims
- 1470US7394599B2Zoom lens and projector with zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted Jul 1, 2008·5 cites·23 claims
- 1569US5600488AProjection lens assembly and projectorCASIO COMPUTER CO LTD·Filed 1995·Granted Feb 4, 1997·34 cites·16 claims
- 1667US5305029AProjectorASAHI OPTICAL CO LTD·Filed 1993·Granted Apr 19, 1994·22 cites·23 claims
- 1766US8002416B2Distance measuring device and projector including same distance measuring deviceCASIO COMPUTER CO LTD·Filed 2008·Granted Aug 23, 2011·2 cites·7 claims
- 1864US4981352AProjection display deviceASAHI OPTICAL CO LTD·Filed 1989·Granted Jan 1, 1991·22 cites·22 claims
- 1963US7619833B2Lens system and projector utilizing the sameCASIO COMPUTER CO LTD·Filed 2007·Granted Nov 17, 2009·3 cites·20 claims
- 2059US7623304B2Lens system and projector using the sameCASIO COMPUTER CO LTD·Filed 2007·Granted Nov 24, 2009·2 cites·20 claims
- 2155US7495841B2Zoom lens and projector using zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted Feb 24, 2009·1 cites·20 claims
- 2255US7423812B2Zoom lens and projector employing zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted Sep 9, 2008·1 cites·8 claims
- 2355US5217299AReflection type lighting apparatusASAHI OPTICAL CO LTD·Filed 1991·Granted Jun 8, 1993·20 cites·26 claims
- 2448US7619831B2Zoom lens and projector unitCASIO COMPUTER CO LTD·Filed 2007·Granted Nov 17, 2009·0 cites·9 claims
- 2547US7944621B2Zoom lens system and a projector with the zoom lens systemCASIO COMPUTER CO LTD·Filed 2009·Granted May 17, 2011·0 cites·10 claims
- 2647US4998191AIlluminating optical deviceASAHI OPTICAL CO LTD·Filed 1989·Granted Mar 5, 1991·7 cites·7 claims
- 2747US4905034AAutomatic focusing projectorASAHI OPTICAL CO LTD·Filed 1987·Granted Feb 27, 1990·10 cites·12 claims
- 2847US4132036AAdjusting structure in an aspheric lens grinding apparatusASAHI OPTICAL CO LTD·Filed 1977·Granted Jan 2, 1979·6 cites·8 claims
- 2945US6837580B2Progressive power lensPENTAX CORP·Filed 2002·Granted Jan 4, 2005·6 cites·16 claims
- 3044US7672065B2Lens system and projector utilizing the sameCASIO COMPUTER CO LTD·Filed 2007·Granted Mar 2, 2010·0 cites·20 claims
- 3143US7548379B2Zoom lens and projector using zoom lensCASIO COMPUTER CO LTD·Filed 2007·Granted Jun 16, 2009·0 cites·20 claims
- 3243US7495842B2Zoom lens and projector unitCASIO COMPUTER CO LTD·Filed 2007·Granted Feb 24, 2009·0 cites·11 claims
- 3343US5353072AAspherical spectacle lensASAHI OPTICAL CO LTD·Filed 1993·Granted Oct 4, 1994·13 cites·7 claims
- 3443US4870442AAuxiliary light projecting apparatus for a focus detecting systemASAHI OPTICAL CO LTD·Filed 1988·Granted Sep 26, 1989·8 cites·8 claims
- 3539US4949115AAutomatic focusing projectorASAHI OPTICAL CO LTD·Filed 1989·Granted Aug 14, 1990·5 cites·3 claims
- 3638US5651598AProjectorASAHI OPTICAL CO LTD·Filed 1993·Granted Jul 29, 1997·4 cites·102 claims
- 3738US5645334AProjector and focusing method thereinASAHI OPTICAL CO LTD·Filed 1995·Granted Jul 8, 1997·6 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →