Patents by Inventor Robert A. Pawlos

Robert A. Pawlos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Portable oxygen concentrator
    Patent number: 4971609
    Abstract: An improved portable oxygen concentrator employing one or more molecular sieve beds for selectively adsorbing nitrogen from atmospheric air for increasing the oxygen concentration of a product gas furnished to a user through a venturi tube which maintains a low pressure high flowrate of an exact concentration of the gas to a user over an extended period. The concentrator utilizes a DC or AC compressor powered by a 12 volt rechargeable battery.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: November 20, 1990
    Inventor: Robert A. Pawlos