Granted Patent
Utility
US 4,373,699 · App. 06/149,909
Fluid flow control valve for dental instruments
Inventor:
Hermann Leiberich
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: May 15, 1980
Inventor
Hermann Leiberich
Assignee (at issue)
Sybron Corporation
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.