73780859
Feb 13, 1989
ELECTRONIC COMPONENTS - NAMELY, LIGHT EMITTING DIODES; PHOTOSENSORS; LIGHT SENSITIVE TRANSISTORS; LIGHT SENSITIVE DIODES; HALL EFFECT SENSORS; INTERRUPTER AND REFLECTIVE OPTOELECTRONIC ASSEMBLIES; FIBER OPTIC APPARATUS AND PARTS THEREFOR; AND HYBRID OPTOELECTRONIC ASSEMBLIES
Electrical and Scientific Apparatus