Granted Patent
Utility
US 5,385,445 · App. 08/161,965
Centrifugal pump
Inventor:
John M. McKenna
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Dec 3, 1993
Inventor
John M. McKenna
Assignee (at issue)
Ingersoll-Dresser Pump 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.