73575158
Dec 24, 1985
Nov 24, 1987
INTEGRATED CIRCUITS, CERAMIC DUAL IN-LINE PACKAGES (CERDIPS), ELECTRONIC CERAMIC FILTERS, CERAMIC AUDIO TONE TRANSDUCERS, ELECTRONIC TRANSDUCERS FOR USE IN WAVE TRANSMITTERS AND RECEIVERS FOR UNDERWATER AND AERIAL COMMUNICATIONS, AND ELECTRONIC OXYGEN SENSORS FOR USE IN ANALYZING AUTOMOBILE EXHAUST EMISSIONS
Electrical and Scientific Apparatus