Inventor

UMEDA JUNICHI

3 patents

Patents

3 patents

US4178604ADec 11, 1979

Semiconductor laser device

HITACHI LTD29 citations80

US4361887ANov 30, 1982

Semiconductor light emitting element

HITACHI LTD18 citations72

US4073676AFeb 14, 1978

GaAs-GaAlAs semiconductor having a periodic corrugation at an interface

HITACHI LTD10 citations72