Patents by Inventor Alexander L. Simpson

Alexander L. Simpson 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).

  • Retro-fit lighting fixture and method of retro-fitting
    Patent number: 5371661
    Abstract: A lighting fixture retrofitting apparatus for retrofitting old technology lighting tube fixtures, with smaller high efficiency lighting tubes, and having a lamp socket housing attachable to the existing ballast cover plate of an existing lighting fixture, a lamp socket opening in the housing, a high efficiency electrical lamp socket supported on the housing, and, fastenings for attaching the housing to the ballast cover of the existing lighting fixture.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: December 6, 1994
    Inventor: Alexander L. Simpson