Patents by Inventor Sharon L. Attra

Sharon L. Attra 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).

  • Flexible air ducting
    Patent number: 6425419
    Abstract: Composite flexible air ducting comprising an elongated inner lining of plastic reinforced by a spirally wound coil member providing an elongated continuous air passage; a layer of natural fiber insulation surrounding the inner lining and an outer sheath surrounding the layer of natural fiber insulation. The outer sheath and the layer of fiber insulation are bonded to each other by a layer of adhesive having substantial thermal insulating properties.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: July 30, 2002
    Inventor: Sharon L. Attra