Patents by Inventor Marcel Carvallo

Marcel Carvallo 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).

  • Patent number: D252108
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: June 12, 1979
    Inventors: Maria E. d. G. Urosa, Marcel Carvallo