Granted Patent
Utility
US 4,093,392 · App. 05/566,727
Milling cutter
Inventor:
David Alan Hopkins
Patented Case
View Patent ↗
Granted: Jun 6, 1978
Filed: Apr 10, 1975
Inventor
David Alan Hopkins
Assignee (at issue)
The Valeron Corporation
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.