Granted Patent
Utility
US 5,924,418 · App. 08/897,092
Rebreather system with depth dependent flow control and optimal PO.sub.2 d e
Inventor:
John E. Lewis
Patented Case
View Patent ↗
Granted: Jul 20, 1999
Filed: Jul 18, 1997
Inventor
John E. Lewis
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.