Patents by Inventor Dale Plewman

Dale Plewman 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).

  • Indirect luminaire
    Patent number: 4866584
    Abstract: An indirect luminaire mounted adjacent a surface for illuminating the same. The luminaire possesses a first reflector positioned such that the source of light lies intermediate the first reflector and the surface. The first reflector includes an edge portion to cut off light emanating from the source of light. A second reflector is positioned between the source of light and the surface. The second reflector reflects light only toward and along the surface.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: September 12, 1989
    Assignee: Columbia Lighting, Inc.
    Inventor: Dale Plewman
  • Reflector system for a luminaire
    Patent number: 4751626
    Abstract: A reflector system for a luminaire having an electric lamp which includes a first reflector and a second reflector extending along opposite sides of the lamp. A cross baffle is located between the first and second reflectors and includes reflecting surfaces at the side portions. The cross baffles also includes a light absorbing portion at the top between the reflecting surfaces of the cross baffle to prevent bright spots in the luminaire.
    Type: Grant
    Filed: May 28, 1987
    Date of Patent: June 14, 1988
    Assignee: Columbia Lighting, Inc.
    Inventor: Dale Plewman