Patents by Inventor Len Giddens

Len Giddens 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).

  • Light sources
    Patent number: 5143438
    Abstract: A luminaire is disclosed comprising a fluorescent plastics outer sleeve having a configuration such that a high proportion of the fluorescent light generated within the sleeve is emitted as visible light. The sleeve includes a fluorescent dye, which dye is excited by a blue phosphor discharge.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: September 1, 1992
    Assignee: Thorn EMI plc
    Inventors: Len Giddens, John C. White, John G. Holden