Patents by Inventor David M. White

David M. White 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 of retaining a token in a ring pull or lever
    Patent number: 5191695
    Abstract: A can end (1) having an openable portion (14) defined by a score line (13), has a ring pull defining an aperture in which is retained a token (16) which may be removed as proof of purchase to qualify the purchaser for a prize or other premium offer. The token (16) is preferably made from a plastics material which is retained by clinching of peripheral material of the ring pull, and may be marked with indicia.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: March 9, 1993
    Assignee: CMB Foodcan plc
    Inventors: Andrew P. Pavely, Roy J. Marr, Peter S. Foskett, David M. White