US PATENT SUBCLASS 379 / 35
.~ Listening-in or eavesdropping type

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

34  DF  SERVICE MONITORING OR OBSERVATION {1}
35.~ Listening-in or eavesdropping type

DEFINITION

Classification: 379/35

Listening-in or eavesdropping type:

(under subclass 34) Subject matter for making a telephone conversation audible to a person without the conversing parties being notified.

SEE OR SEARCH THIS CLASS, SUBCLASS:

85+, for audio recording of a telephone conversation.