Patents by Inventor Sammy Y.H. Ro

Sammy Y.H. Ro 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).

  • Patent number: 6699570
    Abstract: A dynamic reimageable document or electric paper can be formed from ordinary substrates such as paper, transparencies or fabric by printing of microencapsulated Gyricon beads onto one or more discrete surface areas of the substrate. The substrate can include both fixed print regions formed by conventional fixed ink processes and dynamic reimageable regions formed by the Gyricon beads. The Gyricon beads are preferably bichromal and of contrasting colors, such as black/white so as to be changeable to display two states by selective application of electromagnetic force to the beads. By providing bichromal beads in differing color combinations, such as red/white and black/white, a multi-colored document can be achieved in which various fields of the document, representing text, images or graphics, may be in differing colors. Moreover, operations to perform both imaging or erasure can act on the discrete reimageable regions so that the versatility of the electric paper can be enhanced.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: March 2, 2004
    Assignee: Xerox Corporation
    Inventors: Naveen Chopra, Steven Georges, Peter M. Kazmaier, Sammy Y.H. Ro, Man C. Tam, Francisco E. Torres, Sophie V. Vandebroek
  • Publication number: 20030087068
    Abstract: A dynamic reimageable document or electric paper can be formed from ordinary substrates such as paper, transparencies or fabric by printing of microencapsulated Gyricon beads onto one or more discrete surface areas of the substrate. The substrate can include both fixed print regions formed by conventional fixed ink processes and dynamic reimageable regions formed by the Gyricon beads. The Gyricon beads are preferably bichromal and of contrasting colors, such as black/white so as to be changeable to display two states by selective application of electromagnetic force to the beads. By providing bichromal beads in differing color combinations, such as red/white and black/white, a multi-colored document can be achieved in which various fields of the document, representing text, images or graphics, may be in differing colors. Moreover, operations to perform both imaging or erasure can act on the discrete reimageable regions so that the versatility of the electric paper can be enhanced.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 8, 2003
    Applicant: XEROX CORPORATION
    Inventors: Naveen Chopra, Steven Georges, Peter M. Kazmaier, Sammy Y.H. Ro, Man C. Tam, Francisco E. Torres, Sophie V. Vandebroek