Inventor

MATUMURA HIROYOSHI

JP3 patents

Patents

3 patents

US4784451ANov 15, 1988

Waveguide optical switches

HITACHI LTD27 citations92

US4775980AOct 4, 1988

Distributed-feedback semiconductor laser device

HITACHI LTD28 citations92

US4695122ASep 22, 1987

Optical thin film waveguide

HITACHI LTD24 citations80