US PATENT SUBCLASS 112 / 197
.~ Chain or double chain

Current as of: June, 1999
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112 /   HD   SEWING

154  DF  STITCH FORMING {17}
197.~ Chain or double chain {5}
198  DF  .~.~> Hooked needle
199  DF  .~.~> Oscillating or reciprocating looper
200  DF  .~.~> Four-motion looper
201  DF  .~.~> Rotating looper
202  DF  .~.~> Vertical-axis looper

DEFINITION

Classification: 112/197

One loop of thread is inserted through another without passing the thread-supply mass therethrough.