Patents by Inventor Vasil D. Tasi

Vasil D. Tasi 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).

  • Method of manufacturing master for optical information carrier
    Patent number: 4729940
    Abstract: For manufacturing a master for the replication of optical discs a plate of fine-grained copper is coated with a photoresist and exposed by a laser beam which is turned on and off in accordance with information to be recorded on the disc. After developing the photoresist, the exposed portions of the copper layer is etched to a predetermined depth and the photoresist stripped from the etched copper surface.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: March 8, 1988
    Assignee: CBS Inc.
    Inventors: Hanphire H. Nee, Vasil D. Tasi