Granted Patent
Utility
US 4,307,921 · App. 06/153,249
Sleeve bearing
Inventor:
Arden J. Roberts
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: May 27, 1980
Inventor
Arden J. Roberts
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.