Granted Patent
Utility
US 5,175,962 · App. 07/755,400
Method of and apparatus for machining spur and helical gears
Inventor:
Harry Pedersen
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Sep 5, 1991
Inventor
Harry Pedersen
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.