Granted Patent
Utility
US 4,365,444 · App. 05/162,547
Drill point grinding machine
Inventor:
John C. Chwae
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Jun 24, 1980
Inventor
John C. Chwae
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.