Patents by Inventor Sandra Roa Guzman

Sandra Roa Guzman 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).

  • Packaging system
    Patent number: D410841
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: June 8, 1999
    Inventor: Sandra Roa Guzman
  • Packaging system
    Patent number: D434651
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: December 5, 2000
    Inventor: Sandra Roa Guzman
  • Packaging system
    Patent number: D435215
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: December 19, 2000
    Inventor: Sandra Roa Guzman