Granted Patent
Utility
US 6,447,262 · App. 09/567,885
Pumping system for a multi-stage pump
Inventor:
Martin A. Clements
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: May 10, 2000
Inventor
Martin A. Clements
Assignee (at issue)
Argo-Tech 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.