Granted Patent
Utility
US 4,869,362 · App. 07/040,417
Positive seal package
Inventor:
William A. Herr
Patented Case
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Granted: Sep 26, 1989
Filed: Apr 20, 1987
Inventor
William A. Herr
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.