Granted Patent
Utility
US 4,591,996 · App. 06/767,663
Apparatus and method for determining stress and strain in pipes, pressure vessels, structural members and other deformable bodies
Inventor:
Reginald Vachon
Patented Case
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Granted: May 27, 1986
Filed: Aug 21, 1985
Inventor
Reginald Vachon
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.