Inventor · disambiguated record
Isamu Hirai
Also filed as: HIRAI ISAMU
54 granted patents·3 pending applications·751 citations·filing 1984–2013
98Inventor score
Top patents by PatentIndex Score
57 records- 0196US4978981AExposure control deviceASAHI OPTICAL CO LTD·Filed 1989·Granted Dec 18, 1990·49 cites·19 claims
- 0294US5969869APrismASAHI OPTICAL CO LTD·Filed 1997·Granted Oct 19, 1999·154 cites·18 claims
- 0393US6507709B2Photometry devicePENTAX CORP·Filed 2000·Granted Jan 14, 2003·41 cites·36 claims
- 0493US5170205AEliminating camera-shakeASAHI OPTICAL CO LTD·Filed 1990·Granted Dec 8, 1992·45 cites·11 claims
- 0590US5713053ATTL exposure control apparatus in an interchangeable lens cameraASAHI OPTICAL CO LTD·Filed 1996·Granted Jan 27, 1998·35 cites·16 claims
- 0687US5682558ACamera with learning functionASAHI OPTICAL CO LTD·Filed 1995·Granted Oct 28, 1997·23 cites·19 claims
- 0787US5021818AMulti-area brightness measuring apparatusASAHI OPTICAL CO LTD·Filed 1989·Granted Jun 4, 1991·24 cites·44 claims
- 0885US7961245B2Image surface illuminance varying apparatus, exposure correcting apparatus, and exposure correcting methodHOYA CORP·Filed 2009·Granted Jun 14, 2011·7 cites·9 claims
- 0984US5012268AExposure control device for interchangeable lens cameraASAHI OPTICAL CO LTD·Filed 1990·Granted Apr 30, 1991·25 cites·17 claims
- 1080US5168298AAuto focus cameraASAHI OPTICAL CO LTD·Filed 1990·Granted Dec 1, 1992·17 cites·24 claims
- 1179US6369380B1Light receiver unit having a light receiving element and a packaging coverASAHI OPTICAL CO LTD·Filed 1999·Granted Apr 9, 2002·16 cites·13 claims
- 1278US5774746ACamera with learning functionASAHI OPTICAL CO LTD·Filed 1997·Granted Jun 30, 1998·13 cites·99 claims
- 1378US5581314ACamera with stereoscopic optical systemASAHI OPTICAL CO LTD·Filed 1994·Granted Dec 3, 1996·18 cites·26 claims
- 1477US5895133AExposure mode selecting deviceASAHI OPTICAL CO LTD·Filed 1997·Granted Apr 20, 1999·14 cites·11 claims
- 1576US5126780AExposure control apparatus and photographing lens in cameraASAHI OPTICAL CO LTD·Filed 1990·Granted Jun 30, 1992·17 cites·40 claims
- 1675US7961250B2Photographing apparatus having an exposure mode selection functionHOYA CORP·Filed 2007·Granted Jun 14, 2011·4 cites·5 claims
- 1775US6707997B2Flash control systemPENTAX CORP·Filed 2002·Granted Mar 16, 2004·11 cites·13 claims
- 1874US5289225APhotometering apparatus of camera for variably weighting different areas of an image areaASAHI OPTICAL CO LTD·Filed 1991·Granted Feb 22, 1994·16 cites·10 claims
- 1972US5915133ACamera with a photographic mode automatic selecting apparatusASAHI OPTICAL CO LTD·Filed 1997·Granted Jun 22, 1999·37 cites·29 claims
- 2069US7683410B2Image pickup deviceHOYA CORP·Filed 2006·Granted Mar 23, 2010·1 cites·1 claims
- 2169US6510285B2Strobe control devicePENTAX CORP·Filed 2001·Granted Jan 21, 2003·8 cites·12 claims
- 2266US5602616AExposure control apparatus of cameraASAHI OPTICAL CO LTD·Filed 1995·Granted Feb 11, 1997·9 cites·71 claims
- 2365US5005042AElectric control cameraASAHI OPTICAL CO LTD·Filed 1990·Granted Apr 2, 1991·11 cites·8 claims
- 2464US5913087AIndicating apparatus within viewfinder of single lens reflex cameraASAHI OPTICAL CO LTD·Filed 1997·Granted Jun 15, 1999·8 cites·13 claims
- 2564US5557366AStrobe control device for cameraASAHI OPTICAL CO LTD·Filed 1994·Granted Sep 17, 1996·10 cites·22 claims
- 2664US5325147AExposure control apparatus of a cameraASAHI OPTICAL CO LTD·Filed 1993·Granted Jun 28, 1994·11 cites·17 claims
- 2763US6222622B1Photometering apparatus for a cameraASAHI OPTICAL CO LTD·Filed 1998·Granted Apr 24, 2001·8 cites·11 claims
- 2863US4571047ATTL Focus detecting device for single-lens reflex cameraASAHI OPTICAL CO LTD·Filed 1984·Granted Feb 18, 1986·18 cites·6 claims
- 2960US5137350ADistance measuring deviceASAHI OPTICAL CO LTD·Filed 1990·Granted Aug 11, 1992·31 cites·125 claims
- 3058US6718134B2AF auxiliary light projector for AF cameraPENTAX CORP·Filed 2002·Granted Apr 6, 2004·4 cites·9 claims
- 3158US5280319AExposure control apparatus of camera including exposure factor limit value setting meansASAHI OPTICAL CO LTD·Filed 1992·Granted Jan 18, 1994·8 cites·46 claims
- 3258US2010117182A1Image pickup deviceHOYA CORP·Filed 2010·Application pending·0 cites
- 3356US8072508B2Photographing apparatus having first and second operation devicesHIRAI ISAMU·Filed 2007·Granted Dec 6, 2011·1 cites·15 claims
- 3456US6229602B1Photometering apparatusASAHI OPTICAL CO LTD·Filed 1998·Granted May 8, 2001·5 cites·16 claims
- 3555US5999753ASingle-lens reflex cameraASAHI OPTICAL CO LTD·Filed 1998·Granted Dec 7, 1999·5 cites·6 claims
- 3652US2006158546A1Image surface illuminance varying apparatus, exposure correcting apparatus, and exposure correcting methodPENTAX CORP·Filed 2006·Application pending·0 cites
- 3750US6567617B2Photometry device with light and colorimetric sensorsPENTAX CORP·Filed 2001·Granted May 20, 2003·2 cites·30 claims
- 3850US6487372B2Photometry deviceASAHI OPTICAL CO LTD·Filed 2001·Granted Nov 26, 2002·2 cites·66 claims
- 3950US5274429ADistance measuring deviceASAHI OPTICAL CO LTD·Filed 1992·Granted Dec 28, 1993·15 cites·6 claims
- 4049US5485242AExposure control apparatus of cameraASAHI OPTICAL CO LTD·Filed 1995·Granted Jan 16, 1996·4 cites·42 claims
- 4148US5382997AExposure control apparatus of cameraASAHI OPTICAL CO LTD·Filed 1993·Granted Jan 17, 1995·5 cites·20 claims
- 4247US6603928B2Photometry devicePENTAX CORP·Filed 2001·Granted Aug 5, 2003·1 cites·31 claims
- 4347US6556788B2Photometry devicePENTAX CORP·Filed 2000·Granted Apr 29, 2003·1 cites·13 claims
- 4445US7692708B2Photometric apparatusHOYA CORP·Filed 2006·Granted Apr 6, 2010·0 cites·16 claims
- 4545US2006153557A1ViewfinderPENTAX CORP·Filed 2006·Application pending·0 cites
- 4644US5970263APhotometering lens for SLR camera and adjusting of photometering deviceASAHI OPTICAL CO LTD·Filed 1998·Granted Oct 19, 1999·2 cites·13 claims
- 4744US5508779AAuto-bracketing systemASAHI OPTICAL CO LTD·Filed 1994·Granted Apr 16, 1996·4 cites·35 claims
- 4843US6021006AOptical system having composite prismASAHI OPTICAL CO LTD·Filed 1997·Granted Feb 1, 2000·2 cites·9 claims
- 4943US6014273APhotometering apparatusASAHI OPTICAL CO LTD·Filed 1998·Granted Jan 11, 2000·2 cites·22 claims
- 5042US5471276APhotometry systemASAHI OPTICAL CO LTD·Filed 1995·Granted Nov 28, 1995·2 cites·25 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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