Granted Patent
Utility
US 6,238,098 · App. 09/469,481
Roller bearing cage
Inventors:
Wolfgang Knoll, Wolfgang Ortmann
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Dec 22, 1999
Inventors
Wolfgang Knoll
Wolfgang Ortmann
Assignee (at issue)
The Torrington 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.