Granted Patent
Utility
US 5,997,264 · App. 08/844,405
Shaft for a magnetic-drive centrifugal pump using a plurality of grooves
Inventors:
Manfred Klein, Jeffrey S. Brown
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Sep 28, 1996
Inventors
Manfred Klein
Jeffrey S. Brown
Assignee (at issue)
Ansimag Incorporated
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.