US PATENT SUBCLASS 343 / 781 R
.~.~ With external reflector or director

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

700 R  DF  ANTENNAS {58}
772  DF  .~ Wave guide type (e.g., horn) {8}
781 R.~.~ With external reflector or director {3}
782  DF  .~.~.~> With means reducing re-radiation into active antenna
781 P  DF  .~.~.~> Plural reflectors
781 CA  DF  .~.~.~> With main and subreflector (Casse-grain type)

Unofficial Alpha Subclasses: R P CA

DEFINITION

Classification: 343/781

(under subclass 772) Subject matter wherein the wave guide antenna as defined therein is combined with external conductive structure (usually metallic) which reradiates into free space impinging radio waves coming from or going to the antenna.

SEE OR SEARCH THIS CLASS, SUBCLASS:

755, for antennas with spaced radio wave lenses or diffractors and reflectors.

775, for bi-conical horn type antennas with a reflector.

779, for plural wave guide type antennas with a reflector.

780, for "pillbox" type antennas. 833, for antennas with directors in general.

834+, and the Search Notes thereunder, for antennas with reflectors in general.

912+, for reflectors or directors, per se.