Patents by Inventor Douglas M. Kelley

Douglas M. Kelley 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).

  • Yarn tube
    Patent number: 4401283
    Abstract: An improved reuseable yarn tube is illustrated for use in winding yarn such as polypropylene yarn which has at least some degree of elasticity so as to exert a formidable crushing force upon the tube when wound into a package. The yarn tube is illustrated as being manufactured of an injection molded thermoplastic polymer having glass fiber and a compatible coupling agent.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: August 30, 1983
    Inventor: Douglas M. Kelley