Patents by Inventor Maria Polvara

Maria Polvara 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).

  • Spot welding electrode and method for making it
    Patent number: 4859825
    Abstract: The electrode comprises an electrically conductive body including, at least at its active portion, a sintered layer of silver powder having a particle size from 1 to 10 microns and crystalline graphite.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: August 22, 1989
    Inventors: Maria Polvara, Giovanni Crosti, Sergio Lapo