Granted Patent
Utility
US 6,176,662 · App. 09/271,661
Stud having annular rings
Inventors:
Clark Champney, William C. Easterday
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Mar 17, 1999
Inventors
Clark Champney
William C. Easterday
Assignee (at issue)
NELSON STUD WELDING, 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.