Granted Patent
Utility
US 4,904,537 · App. 07/110,642
Copper-lead composite bearing material having fine lead size and method of producing same
Inventor:
Michael D. Lytwynec
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Oct 14, 1987
Inventor
Michael D. Lytwynec
Assignee (at issue)
Federal-Mogul LLC
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.