Inventor
KOUCHI AKIHIKO
4 patents
Patents
4 patentsUS4034550AJul 12, 1977
Electronic wristwatch digital display
SUWA SEIKOSHA KK7 citations72
US4086003AApr 25, 1978
Electrochromic display cell
SUWA SEIKOSHA KK13 citations71
US4019809AApr 26, 1977
Electrochromic display device
SUWA SEIKOSHA KK7 citations71
US4006969AFeb 8, 1977
Electro-chromic display device
SUWA SEIKOSHA KK8 citations71