Granted Patent
Utility
US 4,285,631 · App. 06/087,770
Radial flow centrifugal impeller
Inventor:
Peter J. Taylor
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Oct 24, 1979
Inventor
Peter J. Taylor
Assignee (at issue)
Plessey Handel Und Investments AG
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.