Granted Patent
Utility
US 4,371,773 · App. 06/249,376
Stud welding device
Inventor:
Yoshiteru Kondo
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Mar 31, 1981
Inventor
Yoshiteru Kondo
Assignee (at issue)
USM Holding AG
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.