Granted Patent
Utility
US 4,878,683 · App. 07/224,343
Unitary hub assembly
Inventor:
James A. Dever
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Jul 26, 1988
Inventor
James A. Dever
Assignee (at issue)
Green Ball Bearing Company
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.