Granted Patent
Utility
US 4,824,370 · App. 07/237,660
Dental drill
Inventors:
Jean M. Laurichesse, Henri Leonard
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Aug 25, 1988
Inventors
Jean M. Laurichesse
Henri Leonard
Assignee (at issue)
Micro-Mega
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.