Granted Patent
Utility
US 4,480,952 · App. 06/308,712
Non-burring drill for composite materials
Inventor:
Robert W. Jeremias
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Oct 5, 1981
Inventor
Robert W. Jeremias
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.