Inventor
OTAKE TSUTOMU
6 patents
⚠️ This page may combine multiple inventors who share the name “OTAKE TSUTOMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUWA SEIKOSHA KK
5 patentsUS3979656ASep 7, 1976
Battery charging circuit
SUWA SEIKOSHA KK31 citations81
US4086003AApr 25, 1978
Electrochromic display cell
SUWA SEIKOSHA KK13 citations71
US4057739ANov 8, 1977
Electro-chromic display driving circuit
SUWA SEIKOSHA KK16 citations71
US4019809AApr 26, 1977
Electrochromic display device
SUWA SEIKOSHA KK7 citations71
US4006969AFeb 8, 1977
Electro-chromic display device
SUWA SEIKOSHA KK8 citations71