Granted Patent
Utility
US 5,480,330 · App. 08/321,053
Marine propulsion pump with two counter rotating impellers
Inventor:
Peter W. Brown
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Oct 4, 1994
Inventor
Peter W. Brown
Assignee (at issue)
Outboard Marine 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.