73023422
Jun 6, 1974
May 6, 1975
SEMI-CONDUCTING LIGHT-EMITTING MATERIALS-NAMELY, SINGLE CRYSTALS OF GALLIUM PHOSPHIDE AND GALLIUM PHOSPHIDE WAFERS AND CHIPS
ChemicalsSINGLE LIGHT-EMITTING DIODES AND SEMI-CONDUCTING LIGHT-EMITTING DISPLAYS FOR ELECTRONIC EQUIPMENT
Electrical and Scientific Apparatus