US PATENT SUBCLASS 340 / 305
.~.~ Local circuit to actuate box

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

286.01  DF  SYSTEMS {24}
287  DF  .~ Signal box type (e.g., to call messenger, plural fire alarm boxes) {11}
305.~.~ Local circuit to actuate box {1}
306  DF  .~.~.~> Watchman's local circuit

DEFINITION

Classification: 340/305

(under subclass 287) Subject matter in which the signal box is actuated by a local circuit separate from the main circuit.