Inventor
TANAKA TSUNEFUMI
JP66 patents
⚠️ This page may combine multiple inventors who share the name “TANAKA TSUNEFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
49 patentsUS6507359B1Jan 14, 2003
Image display system
CANON KK159 citations99
US6166866ADec 26, 2000
Reflecting type optical system
CANON KK108 citations99
US5757423AMay 26, 1998
Image taking apparatus
CANON KK175 citations99
US6021004AFeb 1, 2000
Reflecting type of zoom lens
CANON KK92 citations98
US6351333B2Feb 26, 2002
Optical element and optical system having the same
CANON KK105 citations97
US6366411B1Apr 2, 2002
Reflecting type optical system
CANON KK53 citations96
US6301064B1Oct 9, 2001
Optical apparatus
CANON KK60 citations96
US6292309B1Sep 18, 2001
Reflecting type of zoom lens
CANON KK54 citations96
US6023253AFeb 8, 2000
Image displaying apparatus
CANON KK59 citations96
US5694165ADec 2, 1997
High definition image taking apparatus having plural image sensors
CANON KK70 citations96
US5663833ASep 2, 1997
Image display apparatus
CANON KK85 citations96
US5580142ADec 3, 1996
Image forming apparatus and projector using the same
CANON KK78 citations96
US6842280B2Jan 11, 2005
Optical element and optical apparatus
CANON KK22 citations93
US6215596B1Apr 10, 2001
Optical element, optical device provided therewith, and method for evaluating optical element
CANON KK20 citations93
US6124986ASep 26, 2000
Zoom optical system and image pickup apparatus
CANON KK51 citations93
US5905848AMay 18, 1999
Image pickup apparatus with vibration compensation
CANON KK39 citations93
US5844713ADec 1, 1998
Image displaying apparatus
CANON KK37 citations93
US5576890ANov 19, 1996
Zoom lens
CANON KK51 citations93
US5568321AOct 22, 1996
Zoom lens
CANON KK45 citations93
US5528427AJun 18, 1996
Zoom lens
CANON KK26 citations93
US5325236AJun 28, 1994
Ultra-wide-angle type zoom lens
CANON KK22 citations93
US5059007AOct 22, 1991
Internally focusing zoom lens
CANON KK27 citations93
US4842385AJun 27, 1989
Zoom lens
CANON KK25 citations93
US4687302AAug 18, 1987
Zoom lens
CANON KK31 citations93
US4629294ADec 16, 1986
Zoom lens
CANON KK26 citations93
US6639729B2Oct 28, 2003
Reflecting type of zoom lens
CANON KK23 citations92
US6636360B1Oct 21, 2003
Reflecting type of zoom lens
CANON KK20 citations92
US5905597AMay 18, 1999
Optical apparatus
CANON KK34 citations92
US5179473AJan 12, 1993
Zoom lens
CANON KK27 citations92
US5096288AMar 17, 1992
Projection apparatus
CANON KK29 citations92
US5053798AOct 1, 1991
Automatic focusing device
CANON KK30 citations92
US4912494AMar 27, 1990
Camera system
CANON KK25 citations92
US4830477AMay 16, 1989
Zoom lens capable of obtaining focal lengths beyond a variable focal length range
CANON KK34 citations92
US6426841B1Jul 30, 2002
Optical apparatus
CANON KK16 citations84
US4912493AMar 27, 1990
Camera system
CANON KK21 citations82
US4776680AOct 11, 1988
High range zoom lens of reduced size
CANON KK19 citations82
US4749265AJun 7, 1988
Zoom lens
CANON KK20 citations82
US4702567AOct 27, 1987
Zoom lens
CANON KK21 citations82
US6785060B2Aug 31, 2004
Reflecting type optical system
CANON KK5 citations74
US5739960AApr 14, 1998
Zoom lens device with five lens units
CANON KK11 citations74
US5229886AJul 20, 1993
Zoom lens
CANON KK17 citations74
US4865434ASep 12, 1989
Zoom lens capable of selecting a focal length beyond a standard focal length range
CANON KK15 citations74
US4840468AJun 20, 1989
Focusing method for zoom lens
CANON KK11 citations74
US4789227ADec 6, 1988
Zoom lens
CANON KK11 citations74
US4781446ANov 1, 1988
Zoom lens having a capability of introducing special features into image formats
CANON KK14 citations74
US4711534ADec 8, 1987
Zoom lens able to obtain focal lengths beyond the zooming range
CANON KK9 citations74
US4695133ASep 22, 1987
High range zoom lens
CANON KK12 citations74
US4690513ASep 1, 1987
Wide angle high range zoom lens
CANON KK13 citations74
US4666257AMay 19, 1987
Compact zoom lens
CANON KK20 citations74
CANON KABUHSIKI KAISHA
1 patentShowing the top 50 of 66 patents by PatentIndex Score.