Patents by Inventor Alan D. Madsen

Alan D. Madsen 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: 4934321
    Abstract: It has been found that weight on each foot tends to diminish the tendency to wander. The present invention employs a chain of sturdy links, a portion of each end of the chain being inserted into a length of rubber tubing and a hook welded to a link on each end of the chain at one end of the tubing to engage and hold a link at the other end of the tubing to form a loop about a foreleg. The tubing not only serves to prevent chafing of the forelegs by the chain but by its inherent resistance to bending provides a biasing force to improve the securing of the engaged link of the chain with the hook.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: June 19, 1990
    Inventor: Alan D. Madsen