Granted Patent
Utility
US 5,660,531 · App. 08/635,266
Gear pump with minimized canitation
Inventors:
Hans Merkle, Ralf Brunst
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Apr 15, 1996
Inventors
Hans Merkle
Ralf Brunst
Assignee (at issue)
MERCEDES-BENZ GROUP 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.