Patents by Inventor John B. Prince

John B. Prince 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).

  • Patent number: 4491316
    Abstract: An apparatus for practicing the defense arts such as karate including a frame having a vertical mast member on which a universal support bracket is mounted for supporting articles to be struck by the artisan. The support bracket provides a substantially clear span between portions of the article that are supported to minimize the risk of injury. Detachable target members are adapted for mounting on the universal support bracket and are provided with visual and/or audible indicators for measuring the accuracy and intensity of blows delivered to the target members.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: January 1, 1985
    Inventor: John B. Prince