Granted Patent
Utility
US 4,713,952 · App. 06/826,453
Tool and method for rotopeening the peripheral tubes in a tubesheet
Inventors:
Robert D. Senger, William E. Pirl, Charles H. Roth, Jr.
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: Feb 5, 1986
Inventors
Robert D. Senger
William E. Pirl
Charles H. Roth, Jr.
Assignee (at issue)
Westinghouse Electric Company LLC
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.