US PATENT SUBCLASS 206 / 550
.~.~.~ With external vent

Current as of: June, 1999
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206 /   HD   SPECIAL RECEPTACLE OR PACKAGE

216  DF  COMBINED OR CONVERTIBLE {5}
223  DF  .~ Packaged assemblage or kit {20}
541  DF  .~.~ Camp or lunch type {9}
550.~.~.~ With external vent

DEFINITION

Classification: 206/550

(under subclass 541) A container including an aperture or opening in the outer cover of the kit to allow air circulation.

SEE OR SEARCH CLASS

454, Ventilation, appropriate subclasses, for specific ventilation means.