Granted Patent
Utility
US 4,883,097 · App. 06/904,028
Papermakers wet felts
Inventor:
Marcel Dufour
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Sep 4, 1986
Inventor
Marcel Dufour
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.