Granted Patent
Utility
US 4,377,943 · App. 06/239,855
Extrusion die
Inventor:
Francis J. Fuchs, Jr.
Patented Case
View Patent ↗
Granted: Mar 29, 1983
Filed: Mar 2, 1981
Inventor
Francis J. Fuchs, Jr.
Assignee (at issue)
Western Electric Company, 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.