US PATENT SUBCLASS 112 / 311
.~.~ Clamp type

Current as of: June, 1999
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112 /   HD   SEWING

154  DF  STITCH FORMING {17}
303  DF  .~ Feeding work material {13}
311.~.~ Clamp type

DEFINITION

Classification: 112/311

Clamp type:

(under subclass 303) Device wherein the work material is advanced by feed means in the form of two opposed surfaces which grip the upper and lower surfaces of the work material therebetween.