Granted Patent
Utility
US 5,145,076 · App. 07/612,310
Plastic knuckle pin with annular relief grooves for preventing pin failure due to fatigue
Inventors:
Richard F. Murphy, Michael K. Burke
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Nov 13, 1990
Inventors
Richard F. Murphy
Michael K. Burke
Assignee (at issue)
ZefTek, 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.