US PATENT SUBCLASS 62 / 139
.~ By accumulation on freezing surface, e.g., ice

Current as of: June, 1999
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62 /   HD   REFRIGERATION

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

DEFINITION

Classification: 62/139

(under subclass 132) Apparatus responsive to the accumulation of congealed material on a freezing surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

135, for a similar control related to means manufacturing and removing or working a congealed consumable product.