US PATENT SUBCLASS 379 / 371
.~.~ Magneto signalling

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

350  DF  SUPERVISORY OR CONTROL LINE SIGNALLING {5}
352  DF  .~ Substation originated {8}
371.~.~ Magneto signalling

DEFINITION

Classification: 379/371

Magneto signalling:

(under subclass 352) Subject matter contains a manually actuated generator for providing a line signal.

(1) Note. These are generally the older hand crank telephone.

(2) Note. The line signal is considered an address signal for purposes of subclass 352.