Patents by Inventor Harm Drecoll

Harm Drecoll 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).

  • Metal master for producing optical discs
    Patent number: 6163523
    Abstract: Method for producing a press-form (a stamper) for shaping an information-carrying optical storage medium, wherein in a first step, tracks are burned into the covering layer-coated (5) surface (3) of a blank (1) by a laser beam (6) according to the information to be stored before the tracks (7) are filled with metal in an electroplating process in a further step of said method, wherein the blank (1) is made from a cut or stamped metal disc (2) whose surface (3) is ground and polished.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: December 19, 2000
    Assignee: Innovators AG
    Inventor: Harm Drecoll