Granted Patent
Utility
US 5,667,706 · App. 08/643,223
Apparatus and method for laser welding the inner surface of a tube
Inventors:
William E. Pirl, Wesley G. Pope, William G. Cole, Rodney A. Lutz, Frank X. Ponko
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: May 3, 1996
Inventors
William E. Pirl
Wesley G. Pope
William G. Cole
Rodney A. Lutz
Frank X. Ponko
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.