Granted Patent
Utility
US 5,947,481 · App. 09/115,125
Wavy face ring
Inventor:
Lionel A. Young
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Jul 14, 1998
Inventor
Lionel A. Young
Assignee (at issue)
Flowserve Management 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.