Inventor
MINAGAWA SHIGEKAZU
JP5 patents
Patents
5 patentsUS5157679AOct 20, 1992
Optoelectronic devices
HITACHI LTD15 citations73
US5300793AApr 5, 1994
Hetero crystalline structure and semiconductor device using it
HITACHI LTD16 citations72
US4841531AJun 20, 1989
Semiconductor laser device
HITACHI LTD13 citations72
US4794606ADec 27, 1988
Opto-electronic device
HITACHI LTD13 citations72
US4746192AMay 24, 1988
Diffraction grating and process for producing the same
HITACHI LTD13 citations70