Patents by Inventor Gerard Andre David

Gerard Andre David 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).

  • Apparatus for etching the edges of semiconductor plates
    Patent number: 4113543
    Abstract: A mechanochemical method of etching the side wall of circular semiconductor plates, and apparatus for performing the method. The plates are given a rotary movement while their side walls only are contacted with an etching solution, the rotary movement being produced by rotation of at least one cylindrical roller dragging along a film of the etching solution.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: September 12, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Yvon Salles, Pierre Leger, Gerard Andre David