Granted Patent
Utility
US 4,722,209 · App. 06/850,772
Apparatus and method for processing powder metallurgy tubing
Inventor:
William L. Mankins
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Apr 11, 1986
Inventor
William L. Mankins
Assignee (at issue)
INCO Alloys International, 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.