Granted Patent
Utility
US 5,174,692 · App. 07/780,236
Drilling tool and apparatus with improved swarf removal
Inventor:
Guy Martin
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Oct 22, 1991
Inventor
Guy Martin
Assignee (at issue)
Aerospatiale Societe Nationale Industrielle
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.