Patents by Inventor Steven B. Kallestad

Steven B. Kallestad 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).

  • Mouthpiece
    Patent number: 3943924
    Abstract: An athletic mouthpiece of a composite construction is provided which has a relatively flexible, shock absorbing material in which is permanently imbedded a relatively rigid insert located to provide a backing for the upper front teeth. The insert, which in use is situated adjacent the lingual surfaces of the upper front teeth and at least a portion of the palate, aids in delocalizing the forces which penetrate the more flexible material, thereby preventing the concentration of forces in a small area which could result in oral injury.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: March 16, 1976
    Assignee: Northstar Athletic Industries, Inc.
    Inventors: Steven B. Kallestad, Robert H. May