Patents Assigned to Crestworth Limited
  • Display lamp having a translucent envelope
    Patent number: 4170035
    Abstract: A display lamp which includes a container and a source of light and heat mounted adjacent to the container, and, within the container, a liquid in which are suspended a number of insoluble reflecting flakes, the container being substantially surrounded by an envelope at least part of which is translucent.
    Type: Grant
    Filed: October 11, 1977
    Date of Patent: October 2, 1979
    Assignee: Crestworth Limited
    Inventor: Edward C. Walker