Patents by Inventor Dale E. King

Dale E. King 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).

  • Teaching protractor
    Patent number: D246033
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: October 11, 1977
    Inventor: Dale E. King