US PATENT SUBCLASS 455 / 329
.~.~.~.~ Electron beam tube


Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
313  DF  .~ Frequency modifying or conversion {4}
323  DF  .~.~ Particular frequency conversion structure or circuitry {5}
325  DF  .~.~.~ Including distributed electrical parameter structure {3}
329.~.~.~.~ Electron beam tube


DEFINITION

Classification: 455/329

Electron beam tube:

(under subclass 325) Subject matter wherein the frequency conversion means comprises electron beam tube means.

SEE OR SEARCH CLASS

332, Modulators, appropriate subclasses for a pulse, frequency, phase or amplitude modulator utilizing electron beam tubes.