Granted Patent
Utility
US 6,469,272 · App. 09/767,510
Weld gun with inverted roller screw actuator
Inventors:
Michael R. Dugas, Velibor Kilibarda
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Jan 23, 2001
Inventors
Michael R. Dugas
Velibor Kilibarda
Assignee (at issue)
PROGRESSIVE TOOL & INDUSTRIES, CO.
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.