Patents by Inventor Jack W. Severson

Jack W. Severson 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).

  • Fiberglass extension ladder and methods for manufacturing the same
    Patent number: 6269909
    Abstract: An extension ladder comprised of a pair of base rails interlocked in a tongue and groove relationship with a pair of slide rails is disclosed. The rails may be manufactured in a variety of shapes including “I” beams, rectangles, boxes, or even ovals or circular shapes. Some embodiments of the ladder include a pulley assembly which is fastened to a fly rail rung and a rope is passed through the pulley to form a continuous loop around the rungs of the base set of rail rungs and the fly fail rungs. In addition, some embodiments include means for attaching tools to the fly rail.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: August 7, 2001
    Assignee: FiberLite Technologies, Inc.
    Inventors: Ronald R. Grimes, Kelly E. Rasmussen, Jack W. Severson, William R. Isham