US PATENT SUBCLASS 455 / 81
.~.~.~.~ Waveguide

Current as of: June, 1999
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73  DF  TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) {9}
78  DF  .~ With transmitter-receiver switching or interaction prevention {2}
79  DF  .~.~ Automatic (e.g., voice operated) {2}
80  DF  .~.~.~ With distributed parameter coupling {1}
81.~.~.~.~ Waveguide

DEFINITION

Classification: 455/81

Waveguide:

(under subclass 80) Subject matter wherein the transmission line is a hollow conductor.

SEE OR SEARCH CLASS

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

593, for miscellaneous circuits with a distributed parameter element (e.g., waveguide).

333, Wave Transmission Lines and Networks,

13, for waveguides having gas breakdown switching (e.g., T-R) tubes; subclasses 100+ for branching networks; and subclass 13 for hybrid transmit-receiver isolators.