Granted Patent
Utility
US 4,554,433 · App. 06/637,427
Welding conduit stop
Inventor:
David Toothaker
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Aug 3, 1984
Inventor
David Toothaker
Assignee (at issue)
Tweco Products, 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.