Patents by Inventor Richard S. Robertson

Richard S. Robertson 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).

  • Exterior ductwork system
    Patent number: 7044171
    Abstract: This invention provides a duct cover system for ducts installed in exposed locations. For use primarily with ducts having generally rectangular cross sections, the duct cover system provides a roof over the duct that may be integral with the duct or retrofitted to the duct. The roof includes at least one cover panel extending along the duct length. The cover panel is inclined laterally relative to the duct bottom wall thereby to shed water and prevent snow accumulation.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: May 16, 2006
    Inventors: James W. Betley, Keith S. Betley, Dennis L. Horn, Ralph Raymond Delaney, Richard S. Robertson, Larry C. Johnson, Daniel Lee Hightman