Patents by Inventor Wesley E. Douglas

Wesley E. Douglas 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: 6413139
    Abstract: A duck call for reproducing the sounds made by certain whistling ducks without having to flutter the tongue comprising a main body, a mouthpiece frictionally connected to the main body and a tubular roller disposed in a central sound chamber located in the main body of the whistle. Air blown by the user enters the open end of the mouthpiece and passes through an air vent on the mouthpiece into the central sound chamber. A slot formed at the interface of the end of the mouthpiece and an air vent in the main body creates a whistle sound that is directed into the sound chamber to rotate the tubular roller to produce the vibrato effect necessary to emulate the whistling-type ducks. A pair of side members having air chambers therein can be connected to the main body to create a larger resonant chamber in which the roller rotates. Apertures at the closed end of the side members can be open or closed by the user's fingers to selectively produce sounds that mimic other whistling-type ducks.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 2, 2002
    Inventor: Wesley E. Douglas