Patents by Inventor Edmund Calvin

Edmund Calvin 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).

  • Cord retainer
    Patent number: D581255
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: November 25, 2008
    Inventor: Edmund Calvin