Patents by Inventor Douglas C. Zellmer

Douglas C. Zellmer 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: 5688569
    Abstract: A flexible ornamental or protective plastic molding strip has an inserted flexible decorative cord. The flexible molding strip which serves as a base strip has an exposed outer surface that is usually smoothly contoured but can, if desired, be provided with longitudinally extending depressed or projecting surface decoration. In the exposed surface are one or more longitudinally extending grooves. Into each groove is inserted a flexible decorative cord, preferably of a color selected to provide an appealing visual effect, usually a color which contrasts with the color of the base strip itself. The decorative cord can be easily inserted into the groove by pressing it into place either at the factory or at the job site, to harmonize with the decor. The cord can be removed and replaced at any time desired, yet will be held securely in the groove by its contact with the walls of the groove during normal use.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: November 18, 1997
    Assignee: Woodland Holding Corp.
    Inventors: Keith T. Gilmore, William L. Beihoffer, Douglas C. Zellmer
  • Patent number: 5525384
    Abstract: A flexible ornamental or protective plastic molding strip has an inserted flexible decorative cord. The flexible molding strip which serves as a base strip has an exposed outer surface that is usually smoothly contoured but can, if desired, be provided with longitudinally extending depressed or projecting surface decoration. In the exposed surface are one or more longitudinally extending grooves. Into each groove is inserted a flexible decorative cord, preferably of a color selected to provide an appealing visual effect, usually a color which contrasts with the color of the base strip itself. The decorative cord can be easily inserted into the groove by pressing it into place either at the factory or at the job site, to harmonize with the decor. The cord can be removed and replaced at any time desired, yet will be held securely in the groove by its contact with the walls of the groove during normal use.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: June 11, 1996
    Assignee: Woodland Holding Corporation
    Inventors: Keith T. Gilmore, William L. Beihoffer, Douglas C. Zellmer
  • Patent number: 4766623
    Abstract: A spring counter-balanced folding wall bed is described in which compression springs are mounted along the inside surfaces of the bed frame members. The bed frame members are pivoted on a supporting framework and a connecting rod extends between one end of the spring and a spring pivot which is mounted a distance D on the opposite side of the bed pivot from the bed and by a distance H above the bed pivot so that when the bed frame is raised the bed spring is extended and when the bed is lowered the spring is compressed to thereby counter-balance the weight of the bed.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: August 30, 1988
    Inventors: William L. Beihoffer, Douglas C. Zellmer