Granted Patent
Utility
US 5,362,112 · App. 08/122,773
Pipe joint construction and coupling therefor
Inventors:
Larry J. Hamilton, Thomas W. Hawkins, Richard P. Shortman
Patented Case
View Patent ↗
Granted: Nov 8, 1994
Filed: Sep 16, 1993
Inventors
Larry J. Hamilton
Thomas W. Hawkins
Richard P. Shortman
Assignee (at issue)
The Lamson & Sessions Co.
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.