IH

Isamu Hirai

PE Pentax: 38 patents #27 of 761Top 4%
PE Pentax: 10 patents #42 of 396Top 15%
HO Hoya: 5 patents #232 of 1,290Top 20%
RC Ricoh Imaging Company: 1 patents #35 of 67Top 55%
Overall (All Time): #47,785 of 4,157,543Top 2%
54
Patents All Time

Issued Patents All Time

Showing 26–50 of 54 patents

Patent #TitleCo-InventorsDate
5969869 Prism Etsuro Nishio, Yutaka Kamijo 1999-10-19
5970263 Photometering lens for SLR camera and adjusting of photometering device 1999-10-19
5915133 Camera with a photographic mode automatic selecting apparatus Hideaki Tsuji, Masahiro Nakata 1999-06-22
5913087 Indicating apparatus within viewfinder of single lens reflex camera 1999-06-15
5895133 Exposure mode selecting device 1999-04-20
5774746 Camera with learning function Tadayuki Kirigaya, Hideaki Tsuji, Yasuyuki Haneishi, Masato Yamamoto, Masaaki Haga +3 more 1998-06-30
5713053 TTL exposure control apparatus in an interchangeable lens camera 1998-01-27
5682558 Camera with learning function Tadayuki Kirigaya, Hideaki Tsuji, Yasuyuki Haneishi, Masato Yamamoto, Masaaki Haga +3 more 1997-10-28
5602616 Exposure control apparatus of camera Osamu Sato, Satoshi Nakano, Toshiyuki Kitazawa, Takayuki Sensui, Masato Yamamoto +4 more 1997-02-11
5581314 Camera with stereoscopic optical system Shuji Yoneyama, Kiyoshi Kawano, Shinya Suzuka 1996-12-03
5557366 Strobe control device for camera Hideaki Tsuji 1996-09-17
5508779 Auto-bracketing system Osamu Satou, Masahiro Nakata 1996-04-16
5485242 Exposure control apparatus of camera Osamu Sato, Satoshi Nakano, Toshiyuki Kitazawa, Takayuki Sensui, Masato Yamamoto +3 more 1996-01-16
5471276 Photometry system Hideaki Tsuji 1995-11-28
5382997 Exposure control apparatus of camera Osamu Sato, Satoshi Nakano, Toshiyuki Kitazawa, Takayuki Sensui, Masato Yamamoto +4 more 1995-01-17
5351105 Auto focus camera 1994-09-27
5325147 Exposure control apparatus of a camera Tadayuki Kirigaya, Hideaki Tsuji, Nobuhiko Matsudo 1994-06-28
5289225 Photometering apparatus of camera for variably weighting different areas of an image area 1994-02-22
5280319 Exposure control apparatus of camera including exposure factor limit value setting means Osamu Sato, Satoshi Nakano, Toshiyuki Kitazawa, Takayuki Sensui, Masato Yamamoto +3 more 1994-01-18
5274429 Distance measuring device Masayuki Misawa, Saburo Sugawara 1993-12-28
5170205 Eliminating camera-shake Osamu Satoh, Masahiro Nakata 1992-12-08
5168298 Auto focus camera 1992-12-01
5137350 Distance measuring device Masayuki Misawa, Saburo Sugawara 1992-08-11
5126780 Exposure control apparatus and photographing lens in camera Osamu Satou 1992-06-30
5021818 Multi-area brightness measuring apparatus Osamu Satoh, Masahiro Nakata 1991-06-04