US PATENT SUBCLASS 455 / 323
.~.~ Particular frequency conversion structure or circuitry

Current as of: June, 1999
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130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
313  DF  .~ Frequency modifying or conversion {4}
323.~.~ Particular frequency conversion structure or circuitry {5}
324  DF  .~.~.~> Homodyne (i.e., zero beat or synchrodyne reception)
325  DF  .~.~.~> Including distributed electrical parameter structure {3}
331  DF  .~.~.~> Crystal or electron tube diode
332  DF  .~.~.~> Push-pull
333  DF  .~.~.~> Transistor or integrated circuit

DEFINITION

Classification: 455/323

Particular frequency conversion structure or circuitry:

(under subclass 313) Subject matter including significant details of the frequency modifying or conversion means.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

113+, for miscellaneous frequency conversion or control.