Patents by Inventor Billy Charles Covington

Billy Charles Covington 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).

  • Non-thermal process for annealing crystalline materials
    Patent number: 6001715
    Abstract: Bulk crystalline materials are annealed by introducing into them mechanical energy of sufficient intensity to create a large amplitude sound wave. The mechanical energy may be introduced into the material, for example, by laser ablation. Where the bulk crystalline material is a doped semiconductor, the process also electrically activates the material.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: December 14, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Charles Keith Manka, Jacob Grun, Billy Charles Covington, David William Donnelly