Granted Patent
Utility
US 5,683,232 · App. 08/546,735
Pump particularly useful in respirator apparatus and exhalation valve assembly thereof
Inventor:
Carmeli Adahan
Patented Case
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Granted: Nov 4, 1997
Filed: Oct 23, 1995
Inventor
Carmeli Adahan
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.