Patents by Inventor William R. Dreesen

William R. Dreesen 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: 4139195
    Abstract: An automatic powder dispenser for the handles of tennis rackets and the like is disclosed herein which comprises a chamber within the handle and several passageways which connect the chamber with the exterior of the handle. A relatively fine powder of rosin, corn starch, magnesium carbonate, and similar materials is contained within a foraminous cartridge located within the chamber. The particle size of the powder material is less than the size of the openings in the foraminous cartridge and the passageways connecting the chamber to the exterior of the handle. Movement of the handle will therefore result in the powder being dispensed by the cartridge to the chamber and through the connecting passageways to the exterior of the handle. A cap or similar closure is removably received in an exterior opening in said chamber to permit the cartridge to be removed from the chamber.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: February 13, 1979
    Inventors: William R. Dreesen, Lillian Dreesen