US PATENT SUBCLASS 229 / 918
.~ Corner construction

Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

915  DF  STACKING FEATURE {5}
918.~ Corner construction

DEFINITION

Classification: 229/918

Corner construction:

(under subclass 915) Subject matter wherein the structure of the corners of the box enhances its stackability, usually by the inclusion or strengthening means which support the load of the stack.