Granted Patent
Utility
US 6,217,421 · App. 09/478,830
Method of lapping gears
Inventors:
William D. McGlasson, Hermann J. Stadtfeld
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Jan 6, 2000
Inventors
William D. McGlasson
Hermann J. Stadtfeld
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.