Granted Patent
Utility
US 4,845,331 · App. 07/137,623
Pressurized weld chamber
Inventors:
Denis Yeo, Robert Duncan, Kenneth K. Klapper
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Dec 24, 1987
Inventors
Denis Yeo
Robert Duncan
Kenneth K. Klapper
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.