Patents Represented by Attorney Stephen W. Bulkingham
  • Patent number: 7057599
    Abstract: A microstructure to interact with electromagnetic waves by changing optical aspect in selected areas in response to an external signal, the microstructure comprising: a plurality of responsive elements, each responsive element capable of presenting at least two different optical aspects and changing between the optical aspects based on an applied external signal; a support substrate containing the responsive elements; and a plurality of assisting optical lenses each optically enlarging an image from the responsive elements associated with the assisting optical lens.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: June 6, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: David A. Engler, Rolf W. Biernath, John C. Nelson