Granted Patent
Utility
US 5,622,230 · App. 08/490,920
Rotary impact wrench clutch improvement
Inventors:
David A. Giardino, Peder P. Messina, III
Patented Case
View Patent ↗
Granted: Apr 22, 1997
Filed: Jun 15, 1995
Inventors
David A. Giardino
Peder P. Messina, III
Assignee (at issue)
Chicago Pneumatic Tool Company
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.