US PATENT SUBCLASS 229 / 156
.~.~.~.~ One extension interlocks with at least two others

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

100  DF  PAPERBOARD BOX {54}
124  DF  .~ With closure for an access opening {7}
126  DF  .~.~ Foldable wall extension (e.g., closure flap) {13}
155  DF  .~.~.~ Plural extensions mechanically interlocked with each other {2}
156.~.~.~.~ One extension interlocks with at least two others {1}
157  DF  .~.~.~.~.~> The one extension projects through an opening in each of the others

DEFINITION

Classification: 229/156

One extension interlocks with at least two others:

(under subclass 155) Subject matter wherein one extension is physically interconnected with two or more other extensions. [figure]