Inventor
OKAI SAKUO
8 patents
⚠️ This page may combine multiple inventors who share the name “OKAI SAKUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NAPP SYSTEMS INC
7 patentsUS4289071ASep 15, 1981
Shallow relief non-bottoming photopolymer printing plate
NAPP SYSTEMS INC12 citations72
US4164422AAug 14, 1979
Water developable, photopolymer printing plates having ink-repulsive non-image areas
NAPP SYSTEMS INC13 citations72
US4042386AAug 16, 1977
Photosensitive compositions
NAPP SYSTEMS INC18 citations72
US4115119ASep 19, 1978
Shallow relief photopolymer printing plate and methods
NAPP SYSTEMS INC11 citations70
US4283481AAug 11, 1981
Element having phosphine activated photosensitive compositions therein
NAPP SYSTEMS INC3 citations61
US4233391ANov 11, 1980
Water developable photopolymerizable compositions containing phosphine activators and saponified polyvinyl acetate
NAPP SYSTEMS INC4 citations61
US4115123ASep 19, 1978
Shallow relief photopolymer printing plate and methods
NAPP SYSTEMS INC2 citations59