Patents by Inventor David J. Liedtke

David J. Liedtke 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).

  • Compound slingshot
    Patent number: 5531209
    Abstract: A compound slingshot is provided, which consists of a weapon operated by manual energy, to propel a small missile towards a target. A structure is coupled to the weapon, for increasing the speed of the small missile towards the target, by using less manual energy by applying tension to the bowstring of the speed increasing structure so that an elastic band with a pouch will propel the small missile.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: July 2, 1996
    Inventor: David J. Liedtke