US PATENT SUBCLASS 340 / 539
.~.~ Radio

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
531  DF  .~ With particular coupling link {3}
539.~.~ Radio

DEFINITION

Classification: 340/539

Radio:

(under subclass 531) Subject matter where the communication link is by radio waves (i.e., other than light, X, or gamma rays, etc.).

SEE OR SEARCH CLASS

343, Communications: Radio Wave Antennas, appropriate subclasses for radio wave communication systems in general.

375, Pulse or Digital Communications,

200, 294 for the radio link, per se.