US PATENT SUBCLASS 343 / 849
.~.~ Modified natural grounds

Current as of: June, 1999
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343 /   HD   COMMUNICATIONS: RADIO WAVE ANTENNAS

700 R  DF  ANTENNAS {58}
846  DF  .~ With grounding structure (including counterpoises) {3}
849.~.~ Modified natural grounds

DEFINITION

Classification: 343/849

(under subclass 846) Subject matter wherein the natural earth ground is modified by the addition of structure or material in direct contact with or within the earth to modify or maintain the radiation reflecting or absorbing characteristics or electrical conducting properties of the natural ground.

SEE OR SEARCH THIS CLASS, SUBCLASS:

719, for underground or underwater type antennas.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

6+, for earth grounds for conductors.