Granted Patent
Utility
US 4,476,847 · App. 06/414,455
Adjustable double disc grinder dresser
Inventor:
Elman R. Dunn
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 2, 1982
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.