Granted Patent
Utility
US 4,664,243 · App. 06/715,541
Conveyor roller and bearing assembly
Inventor:
Donald E. Martin
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Mar 25, 1985
Inventor
Donald E. Martin
Assignee (at issue)
REXNORD GMBH
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.