73250680
Feb 19, 1980
May 17, 1983
Audio Recording and Reproduction Equipment-Namely, Noise Reduction Systems, Signal Processors, Dynamic Range Enhancers, Audio Recorders, Subharmonic Synthesizers, Disk/Tape Decoders, Voltage Controlled Amplifiers, Decibel Meters and Compressor/Limiters
Electrical and Scientific Apparatus