Granted Patent
Utility
US 6,520,193 · App. 09/816,449
Umbrella with vents on the umbrella cloth for venting wind
Inventor:
Ching-Chuan You
Patented Case
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Granted: Feb 18, 2003
Filed: Mar 26, 2001
Inventor
Ching-Chuan You
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.