Patents by Inventor William Leroy Mitchell

William Leroy Mitchell 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).

  • Periscope rear view helmet and helmet adapter
    Patent number: 3978526
    Abstract: A head helmet including a head protective shell having a crown and a brim defining the top of an open facial area with a frontal area of the shell extending downwardly from the crown to the brim extremity.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: September 7, 1976
    Inventors: William Leroy Mitchell, John W. Yee