Granted Patent
Utility
US 4,581,022 · App. 06/547,768
Dental syringe
Inventors:
Henri Leonard, Michel Seigneurin
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Nov 1, 1983
Inventors
Henri Leonard
Michel Seigneurin
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.