US PATENT SUBCLASS 160 / 190
.~.~.~ Counterbalance only

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

130  DF  PLURAL STRIP, SLAT, OR PANEL TYPE {11}
181  DF  .~ With mounting or supporting means {12}
188  DF  .~.~ With operating means {4}
190.~.~.~ Counterbalance only {1}
191  DF  .~.~.~.~> Spring

DEFINITION

Classification: 160/190

(under subclass 188) Devices having some means usually in the form of weights or springs to counterbalance the weight of the plural strip, slat or panel device, in whole or in part, or to more than counterbalance the weight of the device.