Granted Patent
Utility
US 5,205,657 · App. 07/864,697
Thrust cage roller circle
Inventor:
Gregory N. Feld
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Apr 7, 1992
Inventor
Gregory N. Feld
Assignee (at issue)
Bucyrus Erie 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.