Inventor
YAMADA YU
JP23 patents
⚠️ This page may combine multiple inventors who share the name “YAMADA YU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
17 patentsUS4103990AAug 1, 1978
Catadioptric wide-angle lens system for reproduction
CANON KK38 citations92
US4889416ADec 26, 1989
Finite distance zoom lens
CANON KK13 citations73
US4529276AJul 16, 1985
Image rotating optical system
CANON KK7 citations73
US4285579AAug 25, 1981
Copying lens system
CANON KK7 citations73
US3984186AOct 5, 1976
Projection masking system
CANON KK14 citations73
US4364658ADec 21, 1982
Scanning illuminator
CANON KK7 citations72
US4339183AJul 13, 1982
Film reader
CANON KK8 citations72
US4229085AOct 21, 1980
Film reader
CANON KK14 citations72
US4560242ADec 24, 1985
Variable magnification optical system
CANON KK3 citations62
US4523838AJun 18, 1985
Image forming apparatus
CANON KK6 citations62
US4464024AAug 7, 1984
Optical system for microfilm
CANON KK6 citations62
US4461565AJul 24, 1984
Optical scanning device
CANON KK2 citations62
US4013348AMar 22, 1977
Optical system for reproduction
CANON KK6 citations62
US4429353AJan 31, 1984
Scanning illuminating device
CANON KK4 citations61
US4350433ASep 21, 1982
Scanning illuminator
CANON KK3 citations61
US4447147AMay 8, 1984
Optical scanning device
CANON KK1 citations51
US4236789ADec 2, 1980
Projection optical system
CANON KK1 citations51