Granted Patent
Utility
US 6,408,845 · App. 09/081,144
Respiratory filter
Inventors:
Michael Pereira, Anthony J. Ricci, Pierre Legare
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: May 19, 1998
Inventors
Michael Pereira
Anthony J. Ricci
Pierre Legare
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.