Granted Patent
Utility
US 4,607,891 · App. 06/739,945
Rotary retainer for mining bits
Inventors:
Eugene F. Pendolino, Wayne L. Edmondson, Michael L. O'Neill
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: May 31, 1985
Inventors
Eugene F. Pendolino
Wayne L. Edmondson
Michael L. O'Neill
Assignee (at issue)
Joy Manufacturing 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.