US PATENT SUBCLASS 160 / 315
.~.~.~ With winding or tensioning means

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}
313  DF  .~.~ Spring {5}
315.~.~.~ With winding or tensioning means

DEFINITION

Classification: 160/315

(under subclass 313) Roll type devices in which means other than the operation of the flexible or portable panels are provided for tightening or regulating the tension of the operating spring.