Granted Patent
Utility
US 4,289,066 · App. 06/146,651
Hydraulic position control for mechanical power press slides
Inventor:
Norbert J. Proga
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: May 5, 1980
Inventor
Norbert J. Proga
Assignee (at issue)
Niagara Machine & Tool 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.