Granted Patent
Utility
US 4,674,950 · App. 06/796,819
Pitot tube for pitot type centrifugal pump
Inventor:
John W. Erickson
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Nov 12, 1985
Inventor
John W. Erickson
Assignee (at issue)
Dresser Industries, 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.