Granted Patent
Utility
US 5,894,663 · App. 08/988,487
Method for forming a ball value assembly
Inventors:
Robert J. Evans, Mark W. Schuller, Kraig A. Biberstein, Anna K. Rambo
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: Dec 10, 1997
Inventors
Robert J. Evans
Mark W. Schuller
Kraig A. Biberstein
Anna K. Rambo
Assignee (at issue)
Aeroquip Corporation
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.