Granted Patent
Utility
US 4,614,199 · App. 06/444,056
Smoke filter having extended film overwrap and method and apparatus for fabricating same
Inventor:
Richard M. Berger
Patented Case
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Granted: Sep 30, 1986
Filed: Nov 23, 1982
Inventor
Richard M. Berger
Assignee (at issue)
American Filtrona Corporation
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.