Inventor
TEJIMA YASUYUKI
JP37 patents
⚠️ This page may combine multiple inventors who share the name “TEJIMA YASUYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
20 patentsUS4936657AJun 26, 1990
Projection type liquid-crystal video display device using a fresnel lens
ASAHI OPTICAL CO LTD129 citations98
US5442413AAug 15, 1995
Pupil conjugate-coupling device in projecting optical system
ASAHI OPTICAL CO LTD127 citations97
US5274406ADec 28, 1993
Image projecting device
ASAHI OPTICAL CO LTD106 citations96
US4771308ASep 13, 1988
Auxiliary light projecting apparatus for a focus detecting system
ASAHI OPTICAL CO LTD94 citations96
US5305029AApr 19, 1994
Projector
ASAHI OPTICAL CO LTD22 citations93
US5283599AFeb 1, 1994
Apparatus for combining and projecting images
ASAHI OPTICAL CO LTD40 citations93
US5272570ADec 21, 1993
Illuminating reflection apparatus
ASAHI OPTICAL CO LTD42 citations93
US5005968AApr 9, 1991
Contrast decreasing apparatus in image forming optical system
ASAHI OPTICAL CO LTD32 citations93
US4981352AJan 1, 1991
Projection display device
ASAHI OPTICAL CO LTD22 citations93
US5217299AJun 8, 1993
Reflection type lighting apparatus
ASAHI OPTICAL CO LTD20 citations82
US4918476AApr 17, 1990
Still camera
ASAHI OPTICAL CO LTD19 citations82
US5038162AAug 6, 1991
Still camera
ASAHI OPTICAL CO LTD14 citations74
US4998191AMar 5, 1991
Illuminating optical device
ASAHI OPTICAL CO LTD7 citations74
US5353072AOct 4, 1994
Aspherical spectacle lens
ASAHI OPTICAL CO LTD13 citations73
US4870442ASep 26, 1989
Auxiliary light projecting apparatus for a focus detecting system
ASAHI OPTICAL CO LTD8 citations73
US4905034AFeb 27, 1990
Automatic focusing projector
ASAHI OPTICAL CO LTD10 citations69
US5651598AJul 29, 1997
Projector
ASAHI OPTICAL CO LTD4 citations63
US5645334AJul 8, 1997
Projector and focusing method therein
ASAHI OPTICAL CO LTD6 citations63
US4949115AAug 14, 1990
Automatic focusing projector
ASAHI OPTICAL CO LTD5 citations62
US4132036AJan 2, 1979
Adjusting structure in an aspheric lens grinding apparatus
ASAHI OPTICAL CO LTD6 citations60
CASIO COMPUTER CO LTD
16 patentsUS5600488AFeb 4, 1997
Projection lens assembly and projector
CASIO COMPUTER CO LTD34 citations92
US7548378B2Jun 16, 2009
Zoom lens and projector using zoom lens
CASIO COMPUTER CO LTD8 citations84
US8002416B2Aug 23, 2011
Distance measuring device and projector including same distance measuring device
CASIO COMPUTER CO LTD2 citations63
US7623304B2Nov 24, 2009
Lens system and projector using the same
CASIO COMPUTER CO LTD2 citations62
US7619833B2Nov 17, 2009
Lens system and projector utilizing the same
CASIO COMPUTER CO LTD3 citations62
US7545581B2Jun 9, 2009
Zoom lens and projector unit
CASIO COMPUTER CO LTD4 citations62
US7529034B2May 5, 2009
Zoom lens and projector using zoom lens
CASIO COMPUTER CO LTD6 citations62
US7486450B2Feb 3, 2009
Lens system and projector utilizing the same
CASIO COMPUTER CO LTD5 citations62
US7394599B2Jul 1, 2008
Zoom lens and projector with zoom lens
CASIO COMPUTER CO LTD5 citations62
US7495841B2Feb 24, 2009
Zoom lens and projector using zoom lens
CASIO COMPUTER CO LTD1 citations52
US7423812B2Sep 9, 2008
Zoom lens and projector employing zoom lens
CASIO COMPUTER CO LTD1 citations52
US7944621B2May 17, 2011
Zoom lens system and a projector with the zoom lens system
CASIO COMPUTER CO LTD0 citations42
US7672065B2Mar 2, 2010
Lens system and projector utilizing the same
CASIO COMPUTER CO LTD0 citations41
US7619831B2Nov 17, 2009
Zoom lens and projector unit
CASIO COMPUTER CO LTD0 citations41
US7548379B2Jun 16, 2009
Zoom lens and projector using zoom lens
CASIO COMPUTER CO LTD0 citations41
US7495842B2Feb 24, 2009
Zoom lens and projector unit
CASIO COMPUTER CO LTD0 citations41