Granted Patent
Utility
US 6,446,664 · App. 09/661,526
Erosion resistant wear sleeve for high pressure valves
Inventor:
Michael E. Parsons
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Sep 13, 2000
Inventor
Michael E. Parsons
Assignee (at issue)
Power Chokes
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.