Patents by Inventor Walter E. Hardester, III

Walter E. Hardester, III 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).

  • Device for enhancing moisture content of inspired air in a closed respiratory system
    Patent number: 5438978
    Abstract: A hollow, elongated shaft (20) containing a layer of porous material (30) that is capable of retaining moisture is designed to fit within the airway (13) of the mouthpiece (11) of a closed respiratory system to receive water vapor from expired air and allow the water vapor to be taken up by inspired air.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: August 8, 1995
    Assignee: Weh, Inc.
    Inventor: Walter E. Hardester, III