Patents by Inventor Dale B. Mattheis

Dale B. Mattheis 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).

  • Sound attenuator for use in conjunction with the motorcycle helmet or the like
    Patent number: 4370758
    Abstract: A motorcycle helmet having a modified exterior configuration to attenuate noise generated when passing through the air. The modified helmet begins flaring outwardly from the traditional helmet configuration at a point adjacent to the chin of the wearer, terminates at a location generally behind the ear of the wearer and is spaced from the exterior shell of the helmet at the central portion of the rearward edge. The trailing edge of the sound attentuating device is open so that the wearer retains the ability to hear noises from behind and beside him.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: February 1, 1983
    Inventor: Dale B. Mattheis