Granted Patent
Utility
US 4,484,892 · App. 06/374,952
Hand-held pneumatic implement for removing dental scale
Inventors:
Jacques Pernot, Bernard Lacour
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: May 5, 1982
Inventors
Jacques Pernot
Bernard Lacour
Assignee (at issue)
Micro Mega, S.A.
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.