Inventor · disambiguated record
Ryota Ogawa
Also filed as: ITOH TAKAYUKI · OGAWA RYOTA
64 granted patents·991 citations·filing 1975–2023
99Inventor score
Top patents by PatentIndex Score
64 records- 0196US4936657AProjection type liquid-crystal video display device using a fresnel lensASAHI OPTICAL CO LTD·Filed 1986·Granted Jun 26, 1990·129 cites·25 claims
- 0295US11102389B2Image pickup apparatus and control method thereforCANON KK·Filed 2020·Granted Aug 24, 2021·4 cites·25 claims
- 0392US5442413APupil conjugate-coupling device in projecting optical systemASAHI OPTICAL CO LTD·Filed 1993·Granted Aug 15, 1995·127 cites·39 claims
- 0489US11838632B2Driving control apparatus, image pickup apparatus, and control methodCANON KK·Filed 2022·Granted Dec 5, 2023·4 cites·14 claims
- 0589US7656432B2Method and apparatus for photographing moving objectHOYA CORP·Filed 2006·Granted Feb 2, 2010·13 cites·23 claims
- 0689US7528882B2Image pickup apparatusHOYA CORP·Filed 2005·Granted May 5, 2009·22 cites·4 claims
- 0789US5005968AContrast decreasing apparatus in image forming optical systemASAHI OPTICAL CO LTD·Filed 1989·Granted Apr 9, 1991·32 cites·24 claims
- 0887US4890133AAutofocus cameraASAHI OPTICAL CO LTD·Filed 1988·Granted Dec 26, 1989·59 cites·21 claims
- 0983US11729487B2Image pickup apparatus and control method thereforCANON KK·Filed 2021·Granted Aug 15, 2023·1 cites·14 claims
- 1081US4420248AVariable magnification copying deviceASAHI OPTICAL CO LTD·Filed 1981·Granted Dec 13, 1983·15 cites·9 claims
- 1177US5625487ADevice for adjusting the diopter setting of a finder assemblyASAHI OPTICAL CO LTD·Filed 1995·Granted Apr 29, 1997·13 cites·5 claims
- 1276US10215733B2Non-destructive testing method and a non-destructive testing device for an anchor boltNUCLEAR FUEL INDUSTRIES LTD·Filed 2015·Granted Feb 26, 2019·2 cites·6 claims
- 1376US4322159AVariable magnification type copying machineASAHI OPTICAL CO LTD·Filed 1980·Granted Mar 30, 1982·15 cites·5 claims
- 1475US5923468ASurveying instrument having an automatic focusing deviceASAHI OPTICAL CO LTD·Filed 1997·Granted Jul 13, 1999·58 cites·10 claims
- 1575US4498759AContinuous variable magnification-type copying machine capable of enlarging and contracting an imageASAHI OPTICAL CO LTD·Filed 1982·Granted Feb 12, 1985·17 cites·18 claims
- 1674US4210387AFocus device for zoom lensASAHI OPTICAL CO LTD·Filed 1979·Granted Jul 1, 1980·24 cites·5 claims
- 1771US6480266B2Autofocus distance-measuring optical systemASAHI OPTICAL CO LTD·Filed 2001·Granted Nov 12, 2002·13 cites·13 claims
- 1869US5621568ADevice for adjusting the diopter setting of a finder assemblyASAHI OPTICAL CO LTD·Filed 1992·Granted Apr 15, 1997·11 cites·13 claims
- 1969US4240700AWide angle zoom lens having a high variation ratioASAHI KOGAKU KK·Filed 1978·Granted Dec 23, 1980·22 cites·12 claims
- 2064US4508434ABright medium-range telephoto lensASAHI OPTICAL CO LTD·Filed 1983·Granted Apr 2, 1985·18 cites·5 claims
- 2163US7218384B2Surveying systemPENTAX CORP·Filed 2003·Granted May 15, 2007·16 cites·34 claims
- 2263US4387979ACopying optical systemASAHI OPTICAL CO LTD·Filed 1981·Granted Jun 14, 1983·7 cites·8 claims
- 2362US5572353ALaser scanning deviceASAHI OPTICAL CO LTD·Filed 1994·Granted Nov 5, 1996·18 cites·21 claims
- 2461US12401880B2Image pickup apparatus and control method thereforCANON KK·Filed 2023·Granted Aug 26, 2025·0 cites·28 claims
- 2561US5231433AReflecting illumination projecting deviceASAHI OPTICAL CO LTD·Filed 1991·Granted Jul 27, 1993·17 cites·15 claims
- 2660US7098997B2Surveying systemPENTAX CORP·Filed 2003·Granted Aug 29, 2006·16 cites·36 claims
- 2759US7075634B2Surveying systemPENTAX CORP·Filed 2003·Granted Jul 11, 2006·13 cites·7 claims
- 2858US5576892AVariable power optical systemASAHI OPTICAL CO LTD·Filed 1994·Granted Nov 19, 1996·20 cites·20 claims
- 2957US5373437ADevice for and method of reducing cross talk in optical disk deviceASAHI OPTICAL CO LTD·Filed 1991·Granted Dec 13, 1994·11 cites·17 claims
- 3056US5280464AOptical disk apparatus having a focusing error correcting systemASAHI OPTICAL CO LTD·Filed 1991·Granted Jan 18, 1994·10 cites·4 claims
- 3156US4348082AZoom lens having high zoom ratio including wide angle rangeASAHI KOGALU KOGYO KABUSHIKI K·Filed 1980·Granted Sep 7, 1982·17 cites·5 claims
- 3254US4979808AEndoscope objective lens systemASAHI OPTICAL CO LTD·Filed 1988·Granted Dec 25, 1990·16 cites·12 claims
- 3354US4400080ATwo-drum type copying machine having improved illumination efficiencyASAHI OPTICAL CO LTD·Filed 1981·Granted Aug 23, 1983·5 cites·8 claims
- 3454US4331389ACompact zoom lens systemASAHI OPTICAL CO LTD·Filed 1980·Granted May 25, 1982·14 cites·1 claims
- 3554US4190323AWide angle zoom lens with high zoom ratioASAHI OPTICAL CO LTD·Filed 1978·Granted Feb 26, 1980·13 cites·4 claims
- 3653US5381197AReflecting illumination projecting deviceASAHI OPTICAL CO LTD·Filed 1993·Granted Jan 10, 1995·11 cites·9 claims
- 3751US5900964ALaser scanning deviceASAHI OPTICAL CO LTD·Filed 1996·Granted May 4, 1999·12 cites·14 claims
- 3851US5637396AInner sealing materialTOPPAN PRINTING CO LTD·Filed 1995·Granted Jun 10, 1997·18 cites·10 claims
- 3950US5604622ALaser scanning deviceASAHI OPTICAL CO LTD·Filed 1995·Granted Feb 18, 1997·11 cites·20 claims
- 4050US4474462AVariable magnification type optical copier in which the copying size can be increased or decreasedASAHI OPTICAL CO LTD·Filed 1983·Granted Oct 2, 1984·7 cites·3 claims
- 4149US4142779AZoom lens systemASAHI OPTICAL CO LTD·Filed 1977·Granted Mar 6, 1979·11 cites·4 claims
- 4249US4013350ALarge aperture superwide-angle lensASAHI OPTICAL CO LTD·Filed 1975·Granted Mar 22, 1977·11 cites·2 claims
- 4348US5293188AReflecting illumination type projecting deviceASAHI OPTICAL CO LTD·Filed 1992·Granted Mar 8, 1994·5 cites·15 claims
- 4448US5140467AZooming monocular or binocularsASAHI OPTICAL CO LTD·Filed 1990·Granted Aug 18, 1992·13 cites·25 claims
- 4547US5786935AScopeASAHI OPTICAL CO LTD·Filed 1996·Granted Jul 28, 1998·12 cites·16 claims
- 4647US5491588AAfocal zooming optical systemASAHI OPTICAL CO LTD·Filed 1991·Granted Feb 13, 1996·12 cites·5 claims
- 4747US4998191AIlluminating optical deviceASAHI OPTICAL CO LTD·Filed 1989·Granted Mar 5, 1991·7 cites·7 claims
- 4846US5515208AEndoscope objective lensASAHI OPTICAL CO LTD·Filed 1994·Granted May 7, 1996·11 cites·14 claims
- 4944US4258989AFocus detecting deviceASAHI OPTICAL CO LTD·Filed 1979·Granted Mar 31, 1981·8 cites·11 claims
- 5043US4354756ACopying apparatusASAHI OPTICAL CO LTD·Filed 1981·Granted Oct 19, 1982·5 cites·9 claims
Showing the top 50 of 64 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →