Inventor
SAWADA YOSHIO
23 patents
⚠️ This page may combine multiple inventors who share the name “SAWADA YOSHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
17 patentsUS4329032AMay 11, 1982
Automatic focus indicating device for camera
ASAHI OPTICAL CO LTD16 citations74
US4319813AMar 16, 1982
Automatic focus indicating device for camera
ASAHI OPTICAL CO LTD10 citations74
US4250413AFeb 10, 1981
Camera power supply maintaining circuit
ASAHI OPTICAL CO LTD19 citations74
US4320946AMar 23, 1982
Camera focus detecting device
ASAHI OPTICAL CO LTD9 citations73
US4326127AApr 20, 1982
Focus detecting device
ASAHI OPTICAL CO LTD2 citations63
US4293207AOct 6, 1981
Camera focus detecting device
ASAHI OPTICAL CO LTD6 citations63
US4252425AFeb 24, 1981
Camera focus detecting device
ASAHI OPTICAL CO LTD4 citations63
US4112439ASep 5, 1978
Digital display circuit for a photographic exposure meter
ASAHI OPTICAL CO LTD6 citations63
US4171884AOct 23, 1979
Electrically controlled camera device
ASAHI OPTICAL CO LTD4 citations62
US4149785AApr 17, 1979
Diaphragm-type exposure control system having braking arrangement
ASAHI OPTICAL CO LTD2 citations62
US4092653AMay 30, 1978
Mirror movement disable circuit for led display in light finder of slr camera
ASAHI OPTICAL CO LTD2 citations62
US4084166AApr 11, 1978
Circuit for locking led light meter display in response to meter display in response to mirror movement in slr camera
ASAHI OPTICAL CO LTD5 citations62
US4209245AJun 24, 1980
Long time exposure preventing device for camera with electronic flash
ASAHI OPTICAL CO LTD1 citations52
US4180310ADec 25, 1979
Photometric circuit
ASAHI OPTICAL CO LTD1 citations52
US4106035AAug 8, 1978
Photometric circuit
ASAHI OPTICAL CO LTD1 citations52
US4099195AJul 4, 1978
Camera having automatic and manual exposure-time determination
ASAHI OPTICAL CO LTD1 citations52
US4139290AFeb 13, 1979
Lens stop auxiliary brake control device in automatic exposure camera of the lens stop value control type
ASAHI OPTICAL CO LTD1 citations51