Granted Patent
Utility
US 4,478,008 · App. 06/322,883
Thermally stabilized double disc grinding machine
Inventor:
Elman R. Dunn
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Nov 19, 1981
Inventor
Elman R. Dunn
Assignee (at issue)
Litton Industrial Products, Inc.
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.