KO

Keiji Ohsawa

NI Nikon: 15 patents #274 of 2,493Top 15%
NK Nippon Kogaku K.K.: 2 patents #156 of 382Top 45%
Overall (All Time): #280,616 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
5612762 Focus detection device for a camera 1997-03-18
5576896 Structure for attaching a lens to prevent distortion from changes in the ambient conditions Naoki Kitaoka 1996-11-19
5572013 Focus detection apparatus with a light shielding member 1996-11-05
5561492 Camera system using remote control unit 1996-10-01
5546157 Focus state detection device 1996-08-13
5530513 Focus detecting device and method of operation 1996-06-25
5506399 Focus detection device 1996-04-09
5500708 Focus detection device having infrared filter 1996-03-19
5500519 Focus detection device and method of adjusting focus detection device comprising independent pupil adjustment of moveable field lenses Naoki Kitaoka 1996-03-19
5499074 Autofocus camera Nobuo Matsukawa, Sunao Nishioka, Ryuichi Mori, Yoshiyuki Nakano 1996-03-12
5393969 Device for detecting focus at different areas of an image field 1995-02-28
5361119 Focus state display device for camera Masaru Shida, Akira Ezawa, Tsutomu Wakabayashi, Kimio Uematsu, Shinichi Tsukada +1 more 1994-11-01
5122827 Camera provided with an attitude detecting device Takashi Saegusa, Kenji Isono, Tetsuro Goto 1992-06-16
4972222 Exposure controlling apparatus for camera Toshihiro Sato, Tadao Takagi 1990-11-20
4833494 Single lens reflex camera having replaceable view finder 1989-05-23
4775229 Fresnel lens in a finder optical system Yutaka Ichihara, Daijiro Fujie 1988-10-04
4437747 Device for mounting an electronic flash unit Masato Ohno 1984-03-20