Granted Patent
Utility
US 6,247,847 · App. 09/239,621
Flexible bearing cage
Inventor:
Charles J. Lob
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Jan 30, 1999
Inventor
Charles J. Lob
Assignee (at issue)
Harken, Incorporated
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.