Inventor

HAGIMURA KAZUO

JP3 patents

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

NIPPON TELEGRAPH & TELEPHONE

2 patents

US4244000AJan 6, 1981

PNPN Semiconductor switches

NIPPON TELEGRAPH & TELEPHONE93 citations94

US4489340ADec 18, 1984

PNPN Light sensitive semiconductor switch with phototransistor connected across inner base regions

NIPPON TELEGRAPH & TELEPHONE13 citations71

OKI ELECTRIC IND CO LTD

1 patent

US5304819AApr 19, 1994

Light-activated semiconductor device having light-emitting elements, light-receiving elements and output elements

OKI ELECTRIC IND CO LTD10 citations69