Patents by Inventor Raymond Z. Blinstrubas

Raymond Z. Blinstrubas 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).

  • Method and apparatus for stamping a metal sheet with an apertured design having rolled edges
    Patent number: 6233989
    Abstract: A metal container lid having an apertured design with rolled edges is stamped by a method and apparatus incorporating a cushioning pad between a die and the metal sheet, which is then stamped with a perforating punch.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: May 22, 2001
    Assignee: Changing Paradigms, LLC
    Inventor: Raymond Z. Blinstrubas