Patents by Inventor Douglas Scott Hammond

Douglas Scott Hammond 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).

  • Internally illuminated sign
    Patent number: 5664878
    Abstract: An internally illuminated sign in which a luminaire mounted on the border or periphery of the sign uniformly illuminates the face and/or faces of the sign thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and relamping.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: September 9, 1997
    Assignee: Holophane Corporation
    Inventors: Gregory J. Subisak, Douglas Scott Hammond