Granted Patent
Utility
US 6,772,785 · App. 10/045,891
Demand valve for breathing apparatus
Inventor:
Peter J. Jackson
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jan 9, 2002
Inventor
Peter J. Jackson
Assignee (at issue)
International Safety Instruments, 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.