Patents by Inventor Lawrence M. Schentrup

Lawrence M. Schentrup 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: 4708682
    Abstract: A helicopter toy including a hollow body which forms an elongated conduit. A generally elongated planar tail member is secured to the body at one end of the body and is axially aligned with the body. The tail member also includes a generally planar flap secured thereto. The flap is generally horizontal and is arranged at any angle to the plane of the tail. A multi-bladed, boomerang-shaped propeller is rotatably secured to the body so that the body is suspended from the propeller. The toy may be thrown to describe a curved flight path, whereby the toy will return to the operator, or different flight patterns depending on the selected propeller. Air passes through the hollow body to continually keep the hollow body aligned with the path of flight of the toy.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: November 24, 1987
    Inventor: Lawrence M. Schentrup