US PATENT SUBCLASS 135 / 22
.~ Self-opening and closing

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

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

DEFINITION

Classification: 135/22

(under subclass 15.1) Umbrellas which are automatically opened or closed usually by a spring within or surrounding the stick and acting upon the runner.