Granted Patent
Utility
US 6,222,297 · App. 09/404,377
Pressed V-groove pancake slip ring
Inventor:
Jerry T. Perdue
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Sep 24, 1999
Inventor
Jerry T. Perdue
Assignee (at issue)
Litton Systems, Inc.
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.