US PATENT SUBCLASS 343 / 910
.~.~.~ Zoned type


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

700 R  DF  ANTENNAS {58}
907  DF  .~ Antenna components {3}
909  DF  .~.~ Refracting means and radio wave energy filters (e.g., lenses and polarizers) {2}
910.~.~.~ Zoned type


DEFINITION

Classification: 343/910

(under subclass 909) Subject matter wherein the component presents to the wave front a propagating medium whose surface offers abrupt changes in propagating characteristic.

(1) Note. These changes may result from changes in propagating material, or in length of propagating path such as a stepped formation. A mere series of parallel metal

strips in an air dielectric would not be classified here, but in subclass 909, above.