US PATENT SUBCLASS 340 / 815.85
.~.~ Self restoring type annunciator

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

815.4  DF  VISUAL INDICATION {18}
815.83  DF  .~ Movable {5}
815.85.~.~ Self restoring type annunciator

DEFINITION

Classification: 340/815.85

Self restoring type annunciator:

(under subclass 815.83) Subject matter comprising a target raised into an operative position by an energized electromagnet and dropped back to an inoperative position by gravitational force.