US PATENT SUBCLASS 379 / 8
.~ With blocking of normal usage

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

1  DF  DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION MEASUREMENT {12}
8.~ With blocking of normal usage

DEFINITION

Classification: 379/8

With blocking of normal usage:

(under subclass 1) Subject matter including prevention of normal use of a telephone system component being evaluated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

381, for a make busy circuit, in general.