US PATENT SUBCLASS 229 / 75
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Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

68.1  DF  ENVELOPE {10}
75.~ Blanks

DEFINITION

Classification: 229/75

(under subclass 68) Subject matter relating to the cut and folded blank for forming an envelope.