(under subclass 15.1) Umbrella wherein the cover, stick, or both are shaped or strengthened by inclosed fluid pressure, i.e., the canopy is open by inflation and collapsed by the release of inflating fluid from the canopy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
22+, for containers of compressed gas used to automatically open and close an umbrella.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
2.11+, for shelter, building, or building component strengthened by fluid pressure.
