Granted Patent
Utility
US 5,201,642 · App. 07/800,058
Magnetic drive pump
Inventor:
Charles Hinckley
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Nov 27, 1991
Inventor
Charles Hinckley
Assignee (at issue)
Warren Pumps, 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.