Granted Patent
Utility
US 5,524,940 · App. 08/408,489
Pipe coupler device
Inventor:
Donald W. Wartluft
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Mar 22, 1995
Inventor
Donald W. Wartluft
Assignee (at issue)
Continental Industries, 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.