Granted Patent
Utility
US 5,467,794 · App. 08/024,690
Collapsible shade structure
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Mar 1, 1993
Inventor
Yu Zheng
Assignee (at issue)
Posit Plus
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.