US PATENT SUBCLASS 333 / 242
.~.~ Circular or helical structure

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

236  DF  LONG LINES {4}
239  DF  .~ Waveguide type {3}
242.~.~ Circular or helical structure

DEFINITION

Classification: 333/242

Circular or helical structure:

(under subclass 239) Subject matter wherein the guide structure is a hollow conductive cylinder, a helical conductor, or a helical conductor located within a conductive screen.