Granted Patent
Utility
US 5,896,934 · App. 08/925,886
Reciprocating tool having a piston retainer
Inventors:
Robert A. Yaniero, Jack Pressley
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Sep 8, 1997
Inventors
Robert A. Yaniero
Jack Pressley
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.