Granted Patent
Utility
US 5,395,031 · App. 07/848,764
Stress concentrator aperture-forming means for sealed containers and packages
Inventor:
Sanford Redmond
Patented Case
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Granted: Mar 7, 1995
Filed: Mar 10, 1992
Inventor
Sanford Redmond
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.