Granted Patent
Utility
US 4,924,481 · App. 07/374,728
Radiographic inspection of tube welds in panel walls
Inventor:
Henry P. Vaughn
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Jul 3, 1989
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.