US PATENT SUBCLASS 340 / 825.41
.~.~.~ Step-by-step impulse

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

825  DF  SELECTIVE {23}
825.36  DF  .~ Having indication or alarm (e.g., location indication) {4}
825.38  DF  .~.~ Party line {4}
825.41.~.~.~ Step-by-step impulse {1}
825.42  DF  .~.~.~.~> Polarity controlled

DEFINITION

Classification: 340/825.41

Step by step impulse:

(under subclass 825.38) Subject matter where the selected indicator is actuated in accordance with the number of transmitted impulse.