US PATENT SUBCLASS 340 / 580
.~.~ Ice formation

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.~.~ Ice formation {3}
581  DF  .~.~.~> Thermal
582  DF  .~.~.~> Vibratory
583  DF  .~.~.~> Photoelectric

DEFINITION

Classification: 340/580

Ice formation:

(under subclass 540) Subject matter wherein the condition is a solidification of a liquid or gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

962+, for ice formation detectors on aircraft.