US PATENT SUBCLASS 178 / 120
.~ With electron tube or solid-state device

Current as of: June, 1999
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118  DF  RECEIVERS {4}
120.~ With electron tube or solid-state device

DEFINITION

Classification: 178/120

With electron tube or solid-state device:

(under subclass 118) Subject matter which contains an active element such as a transistor or electron space discharge device.