US PATENT SUBCLASS 370 / 310
COMMUNICATION OVER FREE SPACE

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

310COMMUNICATION OVER FREE SPACE {10}
311  DF  .~> Signaling for performing battery saving
312  DF  .~> Message addressed to multiple destinations
313  DF  .~> Portable address responsive receiver {1}
315  DF  .~> Repeater {2}
328  DF  .~> Having a plurality of contiguous regions served by respective fixed stations {2}
339  DF  .~> Plural usage of common antenna
340  DF  .~> Using trunking {1}
342  DF  .~> Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)
343  DF  .~> Combining or distributing information via frequency channels {1}
345  DF  .~> Combining or distributing information via time channels {4}

DEFINITION

Classification: 370/310

COMMUNICATION OVER FREE SPACE:

(under the class definition) Subject matter wherein multiplex communication signals are transmitted over a medium which is not a wire or a waveguide.

(1) Note. A waveguide may be used in this communication system for other purpose (e.g., for coupling).

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

113+, for duplex and subclasses 115+ for multiplex optical communication which includes an optical waveguide.

375, Pulse or Digital Communications, appropriate subclass for digital communications not limited to multiplex communications.

455, Telecommunications, appropriate subclass for nonmultiplex radio communication.