Granted Patent
Utility
US 6,578,258 · App. 10/155,708
Pierce nut installation head
Inventors:
Mark S. Boyer, John F. Zak
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: May 24, 2002
Inventors
Mark S. Boyer
John F. Zak
Assignee (at issue)
Whitesell of Michigan 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.