Patents by Inventor Stephen A. Mitchell

Stephen A. Mitchell 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).

  • Interlocking panel system
    Patent number: 8596000
    Abstract: A panel system includes elongated panels coupled together at a seam portion with respective interlocking portions at corresponding vertical ends to provide a substantially planar surface. In siding panel systems, joined siding panels are provided in vertically arranged rows that further couple together along adjacent horizontal edges of the respective rows of siding panels.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: December 3, 2013
    Assignee: Royal Group, Inc.
    Inventors: Stephen A. Mitchell, Brian L. Stafford, Noel E. King, Rodney L. Olinger
  • Combination holder for disposable leaf and rubbage bags and yard tool
    Patent number: 4971274
    Abstract: Combination holder for maintaining mouth of plastic garbage or leaf bag in open position for storage of garbage for later disposal and garden tool for use in collecting leaves for disposal.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: November 20, 1990
    Inventor: Stephen A. Mitchell
  • Portable desk for use with automobile steering wheel
    Patent number: 4375881
    Abstract: A portable desk of thin compact design which is not only reversible, making both sides thereof suitable for use as a writing surface, but also is easily attachable and removeable from the rim of an automobile or truck steering wheel as and when desired. The portable desk includes a pocket for holding index cards and the like.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: March 8, 1983
    Inventor: Stephen A. Mitchell