US PATENT SUBCLASS 381 / 79
.~ Near field

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

77  DF  ONE-WAY AUDIO SIGNAL PROGRAM DISTRIBUTION {4}
79.~ Near field

DEFINITION

Classification: 381/79

Near field:

(under subclass 77) Subject matter which is a near field or limited range system (i.e., field strength 1/d where d = distance from the transmitter to the receiver) where signal transfer from transmitter to receiver is inductive or capacitive rather wired.

SEE OR SEARCH CLASS

455, Telecommunications,

41, for near field modulated carrier wave systems.