Granted Patent
Utility
US 4,382,350 · App. 06/304,801
Honing stones
Inventor:
Robert H. Gillette
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Sep 23, 1981
Inventor
Robert H. Gillette
Assignee (at issue)
BRAMMALL, 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.