Granted Patent
Utility
US 6,467,483 · App. 09/362,402
Respiratory mask
Inventors:
Ralph E. Kopacko, Zachary Dean Paul, Shari S. Barnett
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Jul 28, 1999
Inventors
Ralph E. Kopacko
Zachary Dean Paul
Shari S. Barnett
Assignee (at issue)
Respironics, Inc.
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.