Patents Assigned to Northstar Athletic Industries, Inc.
  • 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