US PATENT SUBCLASS 340 / 815.71
.~.~.~ Electromagnetic

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

815.4  DF  VISUAL INDICATION {18}
815.69  DF  .~ Diverse indications {2}
815.7  DF  .~.~ Having percussion type indication (e.g., electric bells, chimes) {1}
815.71.~.~.~ Electromagnetic

DEFINITION

Classification: 340/815.71

Electromagnetic:

(under subclass 815.7) Subject matter comprising an electromagnet for operating the striking mechanism.