US PATENT SUBCLASS 160 / 189
.~.~.~ Counterbalance and additional operator

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}
189.~.~.~ Counterbalance and additional operator

DEFINITION

Classification: 160/189

(under subclass 188) Devices having both a counterbalance and some additional operating means which is not a counterbalance.