US PATENT SUBCLASS 343 / 810
.~.~ Plural

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

700 R  DF  ANTENNAS {58}
793  DF  .~ Balanced doublet - centerfed (e.g., dipole) {17}
810.~.~ Plural {4}
811  DF  .~.~.~> Fishbone-type array
812  DF  .~.~.~> Parallel arrangement {3}
816  DF  .~.~.~> With coupling network
817  DF  .~.~.~> With parasitic element (e.g., reflector or director)

DEFINITION

Classification: 343/810

(under subclass 793) Subject matter including two or more separate and independent doublets as therein defined.

(1) Note. For classification herein the doublets must have their respective arms physically distinct and separate. A two arm doublet even when connected to two sources or loads at different frequencies, and which radiates at both frequencies efficiently is not sufficient for classification herein, but would normally be classified as a single doublet in such

subclasses as 818+, 820+ and 823+, below. Further the doublets must have their respective arms independently connected to the source or load. When the arms of one doublet are connected to the source or load through the arms of the other doublet as a current conducting medium, classification is not here but in subclass 801, where the three or more arms of the respective doublets are collinear.

SEE OR SEARCH THIS CLASS, SUBCLASS:

726, and 727, for plural separate diverse type antennas including a balanced doublet.

730, for plural diverse antennas using the same element including a balanced doublet.

741, for high frequency type loops formed by a plurality of balanced doublets. 794, for diverse type doublets.

796, for helically or angularly staggered plural dipoles.

797+, for plural crossed balanced doublets.

799+, for plural circumferentially arranged doublets.

801, for doublets formed by three or more collinear units.

824, for planar arrays of linear antennas.

826+, for plural linear type antennas having an appreciable wave length dimension.

844, for plural antennas spaced a fractional or full wave length apart.

879, for supports for plural separate antennas.

893, and the Search Notes thereunder, for plural antennas in general.