Inventor
OKA KOICHI
JP22 patents
⚠️ This page may combine multiple inventors who share the name “OKA KOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTSUKA DENSHI KK
9 patentsUS5157454AOct 20, 1992
Differential refractometer
OTSUKA DENSHI KK23 citations91
US5015094AMay 14, 1991
Particle size measuring system
OTSUKA DENSHI KK28 citations90
US7483550B2Jan 27, 2009
Method and system for evaluating moving image quality of displays
OTSUKA DENSHI KK11 citations82
US7176464B2Feb 13, 2007
Method of and apparatus for determining the amount of impurity in gas
OTSUKA DENSHI KK14 citations80
US6636308B1Oct 21, 2003
Apparatus for measuring characteristics of optical angle
OTSUKA DENSHI KK13 citations79
US7394483B2Jul 1, 2008
Display evaluation method and apparatus
OTSUKA DENSHI KK7 citations73
US7847819B2Dec 7, 2010
Measurement system for evaluating moving image quality of displays
OTSUKA DENSHI KK4 citations62
US5113083AMay 12, 1992
Light scattering measuring apparatus utilizing a photodetector mounted on a rotary stand
OTSUKA DENSHI KK4 citations58
US7251035B2Jul 31, 2007
Optical cell measurement apparatus
OTSUKA DENSHI KK1 citations48
SUMITOMO METAL MINING CO
3 patentsUS4664723AMay 12, 1987
Samarium-cobalt type magnet powder for resin magnet
SUMITOMO METAL MINING CO9 citations74
US4689073AAug 25, 1987
Method for production of rare-earth element/cobalt type magnetic powder for resin magnet
SUMITOMO METAL MINING CO7 citations71
US4865660ASep 12, 1989
Rare-earth element/cobalt type magnet powder for resin magnets
SUMITOMO METAL MINING CO6 citations57