Granted Patent
Utility
US 4,055,989 · App. 05/667,763
Weld inspection system with dual flaw detection
Inventors:
Edwin Blair Henry, Jr., John A. Patsey, Ralph Rudolph, Donald G. Schindler
Patented Case
View Patent ↗
Granted: Nov 1, 1977
Filed: Mar 17, 1976
Inventors
Edwin Blair Henry, Jr.
John A. Patsey
Ralph Rudolph
Donald G. Schindler
Assignee (at issue)
United States Steel Corporation
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.