Patents by Inventor Harold Richard Henderson

Harold Richard Henderson 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).

  • Noise suppressing welding helmet
    Patent number: 4103359
    Abstract: A welder's helmet having means to reduce the level of noise reaching a welder's ears when the helmet is positioned for welding. The helmet is characterized by the fact that the sound reducing means while fixed to the helmet does not contact or rest upon the head, ears or face of the welder thus not interfering with normal atmosphere circulation between the welder's head and helmet.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: August 1, 1978
    Assignee: Arcair Company
    Inventors: Perry J. Rieppel, Harold Richard Henderson