Patents by Inventor Richard F. Cooper

Richard F. Cooper 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).

  • Two-position ladder
    Patent number: 4846303
    Abstract: A pipe track has a groove in which a ladder is slidably mounted for movement between ends of the track. A pair of spaced, downwardly extending notches at one end of the groove permit the ladder to be pivoted downwardly to occupy a vertical position coplanar with the track; and a pair of spaced, upwardly extending notches at the other end of the groove permit the ladder to be pivoted upwardly to occupy a vertical position coplanar with the track.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: July 11, 1989
    Inventors: Richard F. Cooper, Michael R. Williamson