US PATENT SUBCLASS 160 / 321
.~.~.~ Endless

Current as of: June, 1999
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160 /   HD   FLEXIBLE OR PORTABLE CLOSURE, PARTITION, OR PANEL

238  DF  ROLL TYPE {12}
309  DF  .~ With rotating means {5}
319  DF  .~.~ Strand {3}
321.~.~.~ Endless

DEFINITION

Classification: 160/321

(under subclass 319) Roll type devices in which the operating strand is endless. Includes sprocket chains.