Granted Patent
Utility
US 5,395,189 · App. 08/056,368
Method for the precision working of crowned and/or conical tooth systems
Inventor:
Herbert Schriefer
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Apr 30, 1993
Inventor
Herbert Schriefer
Assignee (at issue)
Hurth Maschinen und Werkzeuge 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.