Granted Patent
Utility
US 4,427,310 · App. 06/378,234
Lubricated bearing
Inventor:
Andrew H. Middleton
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: May 14, 1982
Inventor
Andrew H. Middleton
Assignee (at issue)
British Gas
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.