US PATENT SUBCLASS 379 / 393
.~ Hold circuit

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


379 /   HD   TELEPHONIC COMMUNICATIONS

387  DF  SUBSTATION OR TERMINAL CIRCUITRY {7}
393.~ Hold circuit

DEFINITION

Classification: 379/393

Hold circuit:

(under subclass 387) Subject matter for maintaining a subscriber loop circuit in an active but noncommunicating mode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162+, for a key system hold circuit.