Granted Patent
Utility
US 4,868,964 · App. 07/192,940
Apparatus for joining pipe
Inventor:
Thomas R. Schmitz
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: May 12, 1988
Inventor
Thomas R. Schmitz
Assignee (at issue)
Cameron Iron Works USA, 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.