Granted Patent
Utility
US 5,330,239 · App. 07/770,566
Pipe coupling
Inventors:
Thomas L. Blose, David L. Britten, Kevin J. Humphreys, Trent Michael Victor Kaiser
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Oct 3, 1991
Inventors
Thomas L. Blose
David L. Britten
Kevin J. Humphreys
Trent Michael Victor Kaiser
Assignee (at issue)
IPSCO Enterprises, 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.