US PATENT SUBCLASS 112 / 183
.~.~ Reciprocating bobbin

Current as of: June, 1999
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112 /   HD   SEWING

154  DF  STITCH FORMING {17}
181  DF  .~ Revolving-hook type {3}
183.~.~ Reciprocating bobbin

DEFINITION

Classification: 112/183

The thread-carrier is reciprocated bodily through the loop.