Granted Patent
Utility
US 5,131,809 · App. 07/717,545
Cooling water pump
Inventors:
Bernhard Gesenhues, Detlef Cordts
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: Jun 19, 1991
Inventors
Bernhard Gesenhues
Detlef Cordts
Assignee (at issue)
Firma Carl Freudenberg
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.