Patents by Inventor Robert N. Sandberg

Robert N. Sandberg 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).

  • Upholstery welt cord
    Patent number: 4545283
    Abstract: A fire retardant welt or beading cord having an aluminum foil element provided to dissipate the heat but which normally would be distorted when bent, in which cord memory is provided by an inner core formed from an elongated cylindrical, flexible member, preferably a foamed, flexible polymer.
    Type: Grant
    Filed: September 8, 1983
    Date of Patent: October 8, 1985
    Assignee: Sackner Products, Inc.
    Inventors: Robert N. Sandberg, Robert E. Montle