Inventor
HIRAI ISAMU
JP54 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI ISAMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
38 patentsUS5969869AOct 19, 1999
Prism
ASAHI OPTICAL CO LTD154 citations97
US5713053AJan 27, 1998
TTL exposure control apparatus in an interchangeable lens camera
ASAHI OPTICAL CO LTD35 citations93
US5170205ADec 8, 1992
Eliminating camera-shake
ASAHI OPTICAL CO LTD45 citations93
US5021818AJun 4, 1991
Multi-area brightness measuring apparatus
ASAHI OPTICAL CO LTD24 citations93
US5012268AApr 30, 1991
Exposure control device for interchangeable lens camera
ASAHI OPTICAL CO LTD25 citations93
US4978981ADec 18, 1990
Exposure control device
ASAHI OPTICAL CO LTD49 citations93
US5915133AJun 22, 1999
Camera with a photographic mode automatic selecting apparatus
ASAHI OPTICAL CO LTD37 citations92
US5682558AOct 28, 1997
Camera with learning function
ASAHI OPTICAL CO LTD23 citations92
US5137350AAug 11, 1992
Distance measuring device
ASAHI OPTICAL CO LTD31 citations92
US6369380B1Apr 9, 2002
Light receiver unit having a light receiving element and a packaging cover
ASAHI OPTICAL CO LTD16 citations84
US5168298ADec 1, 1992
Auto focus camera
ASAHI OPTICAL CO LTD17 citations82
US5913087AJun 15, 1999
Indicating apparatus within viewfinder of single lens reflex camera
ASAHI OPTICAL CO LTD8 citations74
US5895133AApr 20, 1999
Exposure mode selecting device
ASAHI OPTICAL CO LTD14 citations74
US5774746AJun 30, 1998
Camera with learning function
ASAHI OPTICAL CO LTD13 citations74
US5581314ADec 3, 1996
Camera with stereoscopic optical system
ASAHI OPTICAL CO LTD18 citations74
US5557366ASep 17, 1996
Strobe control device for camera
ASAHI OPTICAL CO LTD10 citations74
US5289225AFeb 22, 1994
Photometering apparatus of camera for variably weighting different areas of an image area
ASAHI OPTICAL CO LTD16 citations74
US5280319AJan 18, 1994
Exposure control apparatus of camera including exposure factor limit value setting means
ASAHI OPTICAL CO LTD8 citations74
US5274429ADec 28, 1993
Distance measuring device
ASAHI OPTICAL CO LTD15 citations74
US5126780AJun 30, 1992
Exposure control apparatus and photographing lens in camera
ASAHI OPTICAL CO LTD17 citations74
US5005042AApr 2, 1991
Electric control camera
ASAHI OPTICAL CO LTD11 citations74
US4571047AFeb 18, 1986
TTL Focus detecting device for single-lens reflex camera
ASAHI OPTICAL CO LTD18 citations74
US6222622B1Apr 24, 2001
Photometering apparatus for a camera
ASAHI OPTICAL CO LTD8 citations73
US5602616AFeb 11, 1997
Exposure control apparatus of camera
ASAHI OPTICAL CO LTD9 citations73
US5325147AJun 28, 1994
Exposure control apparatus of a camera
ASAHI OPTICAL CO LTD11 citations73
US6487372B2Nov 26, 2002
Photometry device
ASAHI OPTICAL CO LTD2 citations63
US5999753ADec 7, 1999
Single-lens reflex camera
ASAHI OPTICAL CO LTD5 citations63
US5970263AOct 19, 1999
Photometering lens for SLR camera and adjusting of photometering device
ASAHI OPTICAL CO LTD2 citations63
US5508779AApr 16, 1996
Auto-bracketing system
ASAHI OPTICAL CO LTD4 citations63
US5485242AJan 16, 1996
Exposure control apparatus of camera
ASAHI OPTICAL CO LTD4 citations63
US5471276ANov 28, 1995
Photometry system
ASAHI OPTICAL CO LTD2 citations63
US6229602B1May 8, 2001
Photometering apparatus
ASAHI OPTICAL CO LTD5 citations62
US6014273AJan 11, 2000
Photometering apparatus
ASAHI OPTICAL CO LTD2 citations62
US6014525AJan 11, 2000
Photometric device
ASAHI OPTICAL CO LTD5 citations62
US5382997AJan 17, 1995
Exposure control apparatus of camera
ASAHI OPTICAL CO LTD5 citations62
US6021006AFeb 1, 2000
Optical system having composite prism
ASAHI OPTICAL CO LTD2 citations61
US6108496AAug 22, 2000
Exposure control system for camera
ASAHI OPTICAL CO LTD0 citations52
US5351105ASep 27, 1994
Auto focus camera
ASAHI OPTICAL CO LTD0 citations52
PENTAX CORP
7 patentsUS6507709B2Jan 14, 2003
Photometry device
PENTAX CORP41 citations93
US6707997B2Mar 16, 2004
Flash control system
PENTAX CORP11 citations74
US6510285B2Jan 21, 2003
Strobe control device
PENTAX CORP8 citations74
US6718134B2Apr 6, 2004
AF auxiliary light projector for AF camera
PENTAX CORP4 citations63
US6567617B2May 20, 2003
Photometry device with light and colorimetric sensors
PENTAX CORP2 citations63
US6603928B2Aug 5, 2003
Photometry device
PENTAX CORP1 citations52
US6556788B2Apr 29, 2003
Photometry device
PENTAX CORP1 citations52
HOYA CORP
4 patentsUS7961245B2Jun 14, 2011
Image surface illuminance varying apparatus, exposure correcting apparatus, and exposure correcting method
HOYA CORP7 citations84
US7961250B2Jun 14, 2011
Photographing apparatus having an exposure mode selection function
HOYA CORP4 citations63
US7683410B2Mar 23, 2010
Image pickup device
HOYA CORP1 citations52
US7692708B2Apr 6, 2010
Photometric apparatus
HOYA CORP0 citations42
HIRAI ISAMU
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