Inventor

YASUJIMA AKITAKA

3 patents

⚠️ This page may combine multiple inventors who share the name “YASUJIMA AKITAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ASAHI DOW LTD

2 patents

US4243882AJan 6, 1981

Infrared multilayer film thickness measuring method and apparatus

ASAHI DOW LTD45 citations87

US4254337AMar 3, 1981

Infrared interference type film thickness measuring method and instrument therefor

ASAHI DOW LTD21 citations78

ASAHI CHEMICAL IND

1 patent

US4444860AApr 24, 1984

Layered persistent photoconductive element comprises pigment layer and polymer layer containing polyvinyl carbazole

ASAHI CHEMICAL IND7 citations72