Inventor · disambiguated record
Chikara Yamamoto
Also filed as: YAMAMOTO CHIKARA
109 granted patents·10 pending applications·1,549 citations·filing 1994–2025
99Inventor score
Files withFUJI PHOTO OPTICAL CO LTD37FUJIFILM CORP29FUJINON CORP18YAMAMOTO CHIKARA10DENSO ELECTRONICS CORP6
Top patents by PatentIndex Score
119 records- 0197US6353504B1Objective lens for endoscopeFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Mar 5, 2002·115 cites·9 claims
- 0297US6181481B1Objective lens for endoscopeFUJI PHOTO OPTICAL CO LTD·Filed 1999·Granted Jan 30, 2001·202 cites·4 claims
- 0395US5587839AObjective lens system for endoscopeFUJI PHOTO OPTICAL CO LTD·Filed 1995·Granted Dec 24, 1996·165 cites·2 claims
- 0492US6402325B1Illuminating optical system having multiple light sources and lenticular arrays for use with a projection-type display unitFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Jun 11, 2002·57 cites·6 claims
- 0589US6626542B2Reflection type projection optical systemFUJI PHOTO OPTICAL CO LTD·Filed 2002·Granted Sep 30, 2003·28 cites·7 claims
- 0687US5971915AStereoscopic endoscopeFUJI PHOTO OPTICAL CO LTD·Filed 1998·Granted Oct 26, 1999·64 cites·6 claims
- 0786US6559901B2Illumination optical system and projection type display apparatus using the sameFUJI PHOTO OPTICAL CO LTD·Filed 2001·Granted May 6, 2003·29 cites·9 claims
- 0884US7715111B2Projection zoom lens system and projection type display apparatusFUJINON CORP·Filed 2009·Granted May 11, 2010·13 cites·13 claims
- 0983US9873375B2Vehicle approach alert deviceANDEN CO LTD·Filed 2016·Granted Jan 23, 2018·7 cites·17 claims
- 1083US6480340B1Zoom lensFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Nov 12, 2002·28 cites·8 claims
- 1183US5936778AObjective lens for endoscopeFUJI PHOTO OPTICAL CO LTD·Filed 1998·Granted Aug 10, 1999·62 cites·10 claims
- 1282US7280285B2Projection lens and projection display device using the sameFUJINON CORP·Filed 2006·Granted Oct 9, 2007·12 cites·13 claims
- 1381US6337759B1Polarization converter and projection-type display device using the sameFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Jan 8, 2002·22 cites·9 claims
- 1480US10371942B2Heads-up display deviceFUJIFILM CORP·Filed 2017·Granted Aug 6, 2019·3 cites·20 claims
- 1579US6738196B2Zoom lens with distortion correction and projection optical apparatus using itFUJI PHOTO OPTICAL CO LTD·Filed 2002·Granted May 18, 2004·20 cites·17 claims
- 1678US7764437B2Objective lens for endoscopeFUJINON CORP·Filed 2006·Granted Jul 27, 2010·7 cites·3 claims
- 1777US8508855B2Projection lens and projection-type display apparatus using the lensYAMAMOTO CHIKARA·Filed 2011·Granted Aug 13, 2013·4 cites·16 claims
- 1877US8320048B2Projection lens and projection-type display apparatus using the lensYAMAMOTO CHIKARA·Filed 2011·Granted Nov 27, 2012·4 cites·21 claims
- 1977US6222680B1Zoom lensFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Apr 24, 2001·19 cites·8 claims
- 2076US6317269B1Projection lens and projector apparatusFUJI PHOTO OPTICAL CO LTD·Filed 2000·Granted Nov 13, 2001·17 cites·7 claims
- 2176US5666228ARetrofocus type lensFUJI PHOTO OPTICAL CO LTD·Filed 1996·Granted Sep 9, 1997·48 cites·2 claims
- 2275US8947792B2Projection lens and projection-type display apparatus using the lensFUJIFILM CORP·Filed 2013·Granted Feb 3, 2015·3 cites·20 claims
- 2375US7355799B2Projection lens and projection display device using the sameFUJINON CORP·Filed 2006·Granted Apr 8, 2008·7 cites·24 claims
- 2475US6585380B2Illumination apparatus and projector type display apparatus using the sameFUJI PHOTO OPTICAL CO LTD·Filed 2001·Granted Jul 1, 2003·16 cites·16 claims
- 2574US7885009B2Small projection lens and projection display device using the sameFUJINON CORP·Filed 2009·Granted Feb 8, 2011·6 cites·18 claims
- 2674US7529033B2Projection lens device and projection display apparatus using the sameFUJINON CORP·Filed 2008·Granted May 5, 2009·6 cites·10 claims
- 2773US10897603B2Projection display device for projecting and imagingFUJIFILM CORP·Filed 2019·Granted Jan 19, 2021·1 cites·17 claims
- 2872US8922916B2Endoscope objective lens and endoscopeFUJIFILM CORP·Filed 2014·Granted Dec 30, 2014·2 cites·15 claims
- 2972US6075648AProjector-type display deviceFUJI PHOTO OPTICAL CO LTD·Filed 1998·Granted Jun 13, 2000·43 cites·9 claims
- 3072US2025383838A1Volume control deviceDENSO ELECTRONICS CORP·Filed 2025·Application pending·0 cites
- 3172US2025381913A1Sound generation control deviceDENSO ELECTRONICS CORP·Filed 2025·Application pending·0 cites
- 3271US9645382B2Objective lens for endoscope and endoscopeFUJIFILM CORP·Filed 2014·Granted May 9, 2017·2 cites·13 claims
- 3371US9348207B2Illuminating optical system and projection display apparatusFUJIFILM CORP·Filed 2013·Granted May 24, 2016·2 cites·18 claims
- 3471US9285564B2Lens for projection and projection-type display apparatusFUJIFILM CORP·Filed 2014·Granted Mar 15, 2016·2 cites·19 claims
- 3571US8947785B2Endoscope objective lens and endoscopeFUJIFILM CORP·Filed 2014·Granted Feb 3, 2015·2 cites·20 claims
- 3671US7621642B2Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systemsFujinon Corpoaation·Filed 2008·Granted Nov 24, 2009·3 cites·24 claims
- 3771US7310188B2Projection lens and projection type display device using the sameFUJINON CORP·Filed 2007·Granted Dec 18, 2007·5 cites·20 claims
- 3870US8345354B2Lens for projection and projection-type display apparatusFUJIFILM CORP·Filed 2011·Granted Jan 1, 2013·2 cites·17 claims
- 3970US7489452B2Telephoto zoom lens systemHOYA CORP·Filed 2007·Granted Feb 10, 2009·5 cites·7 claims
- 4070US7438419B2Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systemsFUJINON CORP·Filed 2007·Granted Oct 21, 2008·2 cites·7 claims
- 4170US7289270B2Projection lens and projection display apparatusFUJINON CORP·Filed 2006·Granted Oct 30, 2007·5 cites·19 claims
- 4269US10057494B2Distance measurement device, distance measurement control method, and distance measurement control programFUJIFILM CORP·Filed 2017·Granted Aug 21, 2018·1 cites·13 claims
- 4369US10051185B2Distance measurement device, distance measurement control method, and distance measurement control programFUJIFILM CORP·Filed 2017·Granted Aug 14, 2018·1 cites·20 claims
- 4469US10051186B2Distance measurement device, distance measurement control method, and distance measurement control programFUJIFILM CORP·Filed 2017·Granted Aug 14, 2018·1 cites·19 claims
- 4569US10027891B2Distance measurement device, distance measurement control method, and distance measurement control programFUJIFILM CORP·Filed 2017·Granted Jul 17, 2018·1 cites·19 claims
- 4669US10027892B2Distance measurement device, distance measurement control method, and distance measurement control programFUJIFILM CORP·Filed 2017·Granted Jul 17, 2018·1 cites·19 claims
- 4769US8270091B2Projection variable focusing lens and projection display deviceYAMAMOTO CHIKARA·Filed 2009·Granted Sep 18, 2012·4 cites·13 claims
- 4869US6948816B2Method of manufacturing progressive power spectacle lensPENTAX CORP·Filed 2002·Granted Sep 27, 2005·16 cites·20 claims
- 4967US8462438B2Lens for projection and projection-type display apparatusYAMAMOTO CHIKARA·Filed 2011·Granted Jun 11, 2013·2 cites·17 claims
- 5067US7591560B2Reflection optical system and projection display apparatus using the sameFUJINON CORP·Filed 2005·Granted Sep 22, 2009·4 cites·16 claims
Showing the top 50 of 119 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →