Patents Assigned to MINT OF FINLAND LTD.
  • Coin structure
    Patent number: 9414654
    Abstract: Coins and tokens manufactured from metal(s), alloy(s) or metal containing material(s). More specifically, they relate to coin structures which enable a coin to be nondestructively authenticated by an ultrasonic measurement. The core part of coin or token includes 2-16 cavities that are not visible from the exterior of the coin or token. Additionally, the core part or coin or token includes at least one part having a different volume microstructure than the rest of the core part.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: August 16, 2016
    Assignee: MINT OF FINLAND LTD.
    Inventors: Paul Valfrid Gustafsson, Matti Johannes Rastas, Tuomas Mikael Pinomaa