Patents by Inventor Gilbert Y. H. Chan

Gilbert Y. H. Chan 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: 4888759
    Abstract: An optical memory system is disclosed employing laser beams for reading and writing data in an optical disk. The system incorporates a specially designed spatial combining and separating device which functions to combine a writing laser beam with a plurality of reading laser beams in a manner so as to permit the combined beams to be precisely focused on the disk. The spatial combining and separating device also functions to separate the reading laser beams from the writing laser beam after they are reflected from the disk in a manner so as to prevent the higher intensity writing beam from interfering with the proper detection of the lower intensity reading beams.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: December 19, 1989
    Assignee: Burroughs Corporation
    Inventors: Robert L. Hazel, Gilbert Y. H. Chan