Granted Patent
Utility
US 4,885,451 · App. 07/192,001
Automatic stepper for resistance welding
Inventors:
John F. Farrow, David W. Schulz
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: May 9, 1988
Inventors
John F. Farrow
David W. Schulz
Assignee (at issue)
Medar, Inc.
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.