US PATENT SUBCLASS 219 / 69.19
.~.~.~ Safety circuits

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
68  DF  .~ Cutting or disintegrating (e.g., machining engraving) {2}
69.11  DF  .~.~ Electric spark machining {10}
69.19.~.~.~ Safety circuits

DEFINITION

Classification: 219/69.19

Safety circuits:

(under subclass 69.11) Subject matter utilizing a safety circuit in the event of electric arcing or a short circuiting or in the event of danger (e.g., an earthquake or fire).