Patents by Inventor James Douglas Hall

James Douglas Hall 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).

  • Publication number: 20140121039
    Abstract: A batting tee that may have an adjustable height. The batting tee may include a base and a riser mounted to the base in a substantially vertical position. A support member may extend laterally from the riser and may support a ball and a stopper. The ball may be attached to the support member by a cord. When a user hits the ball, the ball may rotate and hit the stopper. The stopper prevents the ball from continuing to rotate and the ball may fall back to its original position.
    Type: Application
    Filed: October 29, 2013
    Publication date: May 1, 2014
    Inventors: Donald James Robinson, James Douglas Hall