Granted Patent
Utility
US 6,820,648 · App. 10/390,868
Powered pump assembly with selective relief valve
Inventor:
David Castagnetta
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Mar 17, 2003
Inventor
David Castagnetta
Assignee (at issue)
Axia, 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.