Granted Patent
Utility
US 4,842,925 · App. 07/162,807
Process to manufacture a felt with flap and a felt produced thereby
Inventors:
Marcel Dufour, Jacques Piat
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Mar 1, 1988
Inventors
Marcel Dufour
Jacques Piat
Assignee (at issue)
Asten, Inc.
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.