Patents by Inventor Sylvestre M. Costa

Sylvestre M. Costa 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).

  • Jewelry display card
    Patent number: 5074409
    Abstract: A method of making a jewelry display card includes the steps of welding a plastic hanger member on the rear side of a plastic card member so that the hanger member is spaced inwardly by at least approximately one-sixteenth of an inch from the perimeter of the card member, overlaying a foam pad on the front side of the card member, overlaying a flexible, plastic sheet on the foam pad and welding the flexible, plastic sheet to the card member along a welded seam which extends around substantially the entire perimeter of the card member.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: December 24, 1991
    Assignee: Plastic Development, Inc.
    Inventors: Alfred A. Elkin, Sylvestre M. Costa
  • Method of making a jewelry display card
    Patent number: 4874446
    Abstract: A method of making a jewelry display card includes the steps of welding a plastic hanger member on the rear side of a plastic card member so that the hanger member is spaced inwardly by at least approximately one-sixteenth of an inch from the perimeter of the card member, overlaying a foam pad on the front side of the card member, overlaying a flexible, plastic sheet on the foam pad and welding the flexible, plastic sheet to the card member along a welded seam which extends around substantially the entire perimeter of the card member.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: October 17, 1989
    Assignee: Plastic Development, Inc.
    Inventors: Elkin, Alfred A., Sylvestre M. Costa