Granted Patent
Utility
US 4,420,502 · App. 06/359,291
Apparatus and method for producing a flexible sheet material having a predetermined surface characteristic
Inventor:
Kenneth E. Conley
Patented Case
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Granted: Dec 13, 1983
Filed: Mar 18, 1982
Inventor
Kenneth E. Conley
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.