Granted Patent
Utility
US 5,398,980 · App. 08/152,237
Mechanical pipe joint
Inventors:
Thomas D. Hunter, Olin I. Jackson, Minor W. Pannell
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Nov 16, 1993
Inventors
Thomas D. Hunter
Olin I. Jackson
Minor W. Pannell
Assignee (at issue)
Tyler Pipe 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.