Granted Patent
Utility
US 6,491,213 · App. 09/804,798
Easy open envelope
Inventor:
Douglas Purcell
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Mar 14, 2001
Inventor
Douglas Purcell
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.