Inventor
UMEDA JUN-ICHI
JP13 patents
⚠️ This page may combine multiple inventors who share the name “UMEDA JUN-ICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
12 patentsUS4503540AMar 5, 1985
Phase-locked semiconductor laser device
HITACHI LTD58 citations96
US4337443AJun 29, 1982
Semiconductor laser device with facet passivation film
HITACHI LTD53 citations96
US4369513AJan 18, 1983
Semiconductor laser device
HITACHI LTD32 citations92
US4176325ANov 27, 1979
Semiconductor laser device
HITACHI LTD34 citations91
US4432091AFeb 14, 1984
Semiconductor laser device
HITACHI LTD20 citations82
US4326176AApr 20, 1982
Semiconductor laser device
HITACHI LTD27 citations82
US4257011AMar 17, 1981
Semiconductor laser device
HITACHI LTD24 citations82
US4509173AApr 2, 1985
Phase-locked semiconductor laser device
HITACHI LTD14 citations74
US4426703AJan 17, 1984
Semiconductor laser device
HITACHI LTD7 citations73
US4404678ASep 13, 1983
Semiconductor laser device
HITACHI LTD13 citations73
US4288757ASep 8, 1981
Semiconductor laser device
HITACHI LTD17 citations73
US4025939AMay 24, 1977
Semiconductor laser device and a method for fabricating the same
HITACHI LTD13 citations70