Granted Patent
Utility
US 5,957,762 · App. 08/852,847
Internally toothed tool for the precision machining of gear wheels
Inventor:
Herbert Schriefer
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: May 7, 1997
Inventor
Herbert Schriefer
Assignee (at issue)
THE GLEASON WORKS
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.