Granted Patent
Utility
US 4,447,698 · App. 05/534,066
Welding system monitoring and control system
Inventors:
Truman T. Van Sikle, Charles J. Drake
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Dec 18, 1974
Inventors
Truman T. Van Sikle
Charles J. Drake
Assignee (at issue)
KELSEY-HAYES-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.