Patents Assigned to The Deputy Master and Controller Royal Mint
  • Alloy for coins
    Patent number: 4644674
    Abstract: A coin, a coin blank or metal strip for the production of a coin or a coin blank having as its surface a copper based alloy containing between 15% and 30% (by wt) zinc, between 2% and 7% (by wt) tin and, optionally, between 2% and 7% (by wt) nickel. The alloy is gold-colored, tarnish resistant, fabricable and wear resistant.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: February 24, 1987
    Assignee: The Deputy Master and Controller Royal Mint
    Inventors: George R. Burrows, Ian R. Scholes