Patents by Inventor Donald F. Havens

Donald F. Havens 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: 4293126
    Abstract: A weighted belt for securing to the leg of a swimmer for exercising purposes. The belt is constructed using an elastic latex strip. Lead weights are positioned on the strip, covered by a layer of gauze, which is then covered by the latex material to provide a sealed one-piece structure. The weights have holes therein such that the latex covering material fills the holes to firmly secure the weights to the belt. The ends of the belt are secured by molded buttons on one end engaging openings in the other end.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: October 6, 1981