US PATENT SUBCLASS 62 / 140
.~.~ By frost, i.e., atmospheric condensate

Current as of: June, 1999
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62 /   HD   REFRIGERATION

132  DF  AUTOMATIC CONTROL {19}
139  DF  .~ By accumulation on freezing surface, e.g., ice {1}
140.~.~ By frost, i.e., atmospheric condensate

DEFINITION

Classification: 62/140

(under subclass 139) Apparatus in which the condition sensed is the accumulation of frozen atmospheric condensate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151+, for other automatic handling of frost.

SEE OR SEARCH CLASS

250, Radiant Energy,

215, for photocell control with a specific art device there provided for.