Granted Patent
Utility
US 5,797,146 · App. 08/752,857
Breath deflector with seal
Inventor:
Ronald D. Matich
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Nov 21, 1996
Inventor
Ronald D. Matich
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.