US PATENT SUBCLASS 206 / 507
.~.~ By selective orientation of superposed receptacles

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

503  DF  STRUCTURAL FEATURES FOR VERTICAL STACKING, I.E., SIMILAR RECEPTACLES {5}
505  DF  .~ Having specified means for nesting instead of stacking {2}
507.~.~ By selective orientation of superposed receptacles

DEFINITION

Classification: 206/507

(under subclass 505) A container wherein a relative horizontal rotation of one container with respect to another establishes the pile or interfit relationship.