US PATENT SUBCLASS 455 / 199.1
.~.~.~.~ Discrete frequency types (e.g., channel switching)

Current as of: June, 1999
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130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
150.1  DF  .~ Signal selection based on frequency (e.g., tuning) {13}
196.1  DF  .~.~ Including variation of local oscillator frequency {1}
197.1  DF  .~.~.~ By simultaneous control with signal selection {3}
199.1.~.~.~.~ Discrete frequency types (e.g., channel switching)

DEFINITION

Classification: 455/199.1

Discrete frequency types (e.g., channel switching):

(under subclass 197.1) Subject matter in which the frequency selection means selects distinct, spaced apart, frequencies.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179.1, for similar signal selectors absent local oscillator frequency variation.