US PATENT SUBCLASS 455 / 198.1
.~.~.~.~ Including distributed parameter control device

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

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}
198.1.~.~.~.~ Including distributed parameter control device

DEFINITION

Classification: 455/198.1

Including distributed parameter control device:

(under subclass 197.1) Subject matter wherein the means to select either the carrier wave or the local oscillator frequency is of the electromagnetic wave transmission type (e.g., resonators, waveguides).

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks, appropriate subclasses for such distributed parameter devices and networks.

334, Tuners,

41+, for tuners having resonant line elements.