US PATENT SUBCLASS 229 / 199.1
.~.~ Wooden reinforcing element
Current as of:
June, 1999
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229 /
HD
ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES
100
DF
PAPERBOARD BOX
{54}
199
DF
.~ Separate reinforcing element {1}
199.1
.~.~ Wooden reinforcing element