Granted Patent
Utility
US 5,187,728 · App. 07/515,804
Radiographic inspection of tube welds in panel walls
Inventor:
Henry P. Vaughn
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Apr 27, 1990
Inventor
Henry P. Vaughn
Assignee (at issue)
The Babcock & Wilcox Company
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.