Patents by Inventor John Richard Armstrong

John Richard Armstrong 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).

  • Hairdryer
    Patent number: 4038759
    Abstract: A hairdryer of this invention comprises a helmet to be supported on the user's head, an electric motor driven fan unit to be supported upon the user and having a casing with two outlets, and tube means connecting the casing to the helmet for flow of air from each of the two outlets of the fan unit to the interior of the helmet at the corresponding side of the user's head.
    Type: Grant
    Filed: November 15, 1973
    Date of Patent: August 2, 1977
    Assignee: Firth Cleveland Limited
    Inventors: Hugh Edric Trenchard Dyer, John Richard Armstrong