Granted Patent
Utility
US 4,754,574 · App. 06/925,367
Apparatus for grinding a workpiece
Inventors:
Arthur H. Clough, Edwin L. Knight
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Oct 30, 1986
Inventors
Arthur H. Clough
Edwin L. Knight
Assignee (at issue)
Warner & Swasey
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.