Granted Patent
Utility
US 4,124,328 · App. 05/789,354
Indexable insert drill
Inventor:
David Alan Hopkins
Patented Case
View Patent ↗
Granted: Nov 7, 1978
Filed: Apr 21, 1977
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.