Granted Patent
Utility
US 5,517,843 · App. 08/338,959
Method for making upset ends on metal pipe and resulting product
Inventor:
Thomas E. Winship
Patented Case
View Patent ↗
Granted: May 21, 1996
Filed: Nov 14, 1994
Inventor
Thomas E. Winship
Assignee (at issue)
Shaw Industries Group, 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.