US PATENT SUBCLASS 340 / 581
.~.~.~ Thermal

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

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
580  DF  .~.~ Ice formation {3}
581.~.~.~ Thermal

DEFINITION

Classification: 340/581

Thermal:

(under subclass 580) Subject matter wherein the ice formation is detected by its temperature or its heat transfer properties, or other properties (e.g., conductivity) when the sensed area is heated.

SEE OR SEARCH CLASS

62, Refrigeration,

125+, with indicator or signal.