US PATENT SUBCLASS 135 / 23
.~.~ Tensioned rib and stretcher

Current as of: June, 1999
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135 /   HD   TENT, CANOPY, UMBRELLA, OR CANE

15.1  DF  UMBRELLA {17}
22  DF  .~ Self-opening and closing {2}
23.~.~ Tensioned rib and stretcher

DEFINITION

Classification: 135/23

(under subclass 22) Self-opening and closing umbrellas wherein the means of operation is by a tension device operating upon the ribs or stretchers to draw them toward and hold them in position.