Granted Patent
Utility
US 4,757,644 · App. 07/014,144
Method and apparatus for manufacturing and machining gears
Inventors:
Manfred Erhardt, Herbert Loos
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Feb 12, 1987
Inventors
Manfred Erhardt
Herbert Loos
Assignee (at issue)
Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co.
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.