Granted Patent
Utility
US 6,749,405 · App. 10/123,627
Reversible pivoting vane rotary compressor for a valve-free oxygen concentrator
Inventor:
Stuart Bassine
Patented Case
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Granted: Jun 15, 2004
Filed: Apr 16, 2002
Inventor
Stuart Bassine
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.