Inventor
ISHIHARA TAKETOSHI
JP9 patents
⚠️ This page may combine multiple inventors who share the name “ISHIHARA TAKETOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOKYO OPTICAL
8 patentsUS4306778ADec 22, 1981
Eye refractmeters using infrared rays
TOKYO OPTICAL12 citations73
US4293199AOct 6, 1981
Apparatus for detecting astigmatic axes and measuring refractive powers
TOKYO OPTICAL14 citations71
US4192582AMar 11, 1980
Ophthalmometer
TOKYO OPTICAL14 citations70
US4408847AOct 11, 1983
Refractory power measuring device
TOKYO OPTICAL4 citations62
US4299455ANov 10, 1981
Vision testing instrument
TOKYO OPTICAL4 citations60
US4277150AJul 7, 1981
Eye refractmeter
TOKYO OPTICAL6 citations60
US4094592AJun 13, 1978
Ophthalmic examination chart projector
TOKYO OPTICAL2 citations59
US4162852AJul 31, 1979
Method and device for measuring diopters of astigmatic lenses
TOKYO OPTICAL0 citations41