Granted Patent
Utility
US 5,174,327 · App. 07/828,366
In-line check valve
Inventors:
Perin E. Truax, Eldon D. Jackson
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Jan 30, 1992
Inventors
Perin E. Truax
Eldon D. Jackson
Assignee (at issue)
Viking Group, 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.