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 1–25 of 54 patents

Patent #TitleCo-InventorsDate
9179049 Optical device and single lens reflex camera Naohito Sasaki 2015-11-03
8072508 Photographing apparatus having first and second operation devices Tadahisa Ohkura 2011-12-06
7961250 Photographing apparatus having an exposure mode selection function Tadahisa Ohkura, Toshihiro Hamamura 2011-06-14
7961245 Image surface illuminance varying apparatus, exposure correcting apparatus, and exposure correcting method 2011-06-14
7692708 Photometric apparatus 2010-04-06
7683410 Image pickup device 2010-03-23
6718134 AF auxiliary light projector for AF camera Masayuki Murata 2004-04-06
6707997 Flash control system Yoshikazu Iida 2004-03-16
6603928 Photometry device Yoshikazu Iida 2003-08-05
6571058 Photometry device Yoshikazu Iida 2003-05-27
6567617 Photometry device with light and colorimetric sensors Yoshikazu Iida 2003-05-20
6556788 Photometry device Yoshikazu Iida 2003-04-29
6535693 Photometry device Yoshikazu Iida 2003-03-18
6510285 Strobe control device Yoshikazu Iida 2003-01-21
6510284 Photometry device for a camera including external light sensor Yoshikazu Iida 2003-01-21
6507709 Photometry device Yoshikazu Iida 2003-01-14
6487372 Photometry device Yoshikazu Iida 2002-11-26
6369380 Light receiver unit having a light receiving element and a packaging cover 2002-04-09
6229602 Photometering apparatus Tadahisa Ohkura 2001-05-08
6222622 Photometering apparatus for a camera Tadahisa Ohkura 2001-04-24
6108496 Exposure control system for camera 2000-08-22
6021006 Optical system having composite prism Etsuro Nishio, Yutaka Kamijo 2000-02-01
6014273 Photometering apparatus Katsuki Machida 2000-01-11
6014525 Photometric device Tadahisa Ohkura 2000-01-11
5999753 Single-lens reflex camera Shigeru Iwamoto 1999-12-07