Granted Patent
Utility
US 4,851,189 · App. 07/233,244
Method of manufacturing cams by powder metallurgy
Inventors:
Jurgen Donch, Bernhard Schelb, Wolfgang Zimmermann
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Aug 17, 1988
Inventors
Jurgen Donch
Bernhard Schelb
Wolfgang Zimmermann
Assignee (at issue)
Ringsdorff-Werke GmbH
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.