US PATENT SUBCLASS 220 / 215
.~ With heat insulating insert or captive air space

Current as of: June, 1999
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220 /   HD   RECEPTACLES

200  DF  CLOSURES {45}
215.~ With heat insulating insert or captive air space

DEFINITION

Classification: 220/215

(under subclass 200) Device constructed to reduce conductivity of heat by having (1) an insert having a low heat conducting capacity or (2) being made of hollow form providing a dead air space.