Patents Assigned to Inovink Limited
  • Security printing
    Patent number: 10259255
    Abstract: An article comprising a substrate which carries a doped tin oxide wherein less than 50 mol % of the tin atoms in the tin oxide are substituted with a dopant element.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: April 16, 2019
    Assignees: Inovink Limited, Keeling & Walker Limited
    Inventors: David Malcolm Lewis, Dieter Guhl
  • Security inks containing infrared absorbing metal compounds
    Patent number: 8157905
    Abstract: Composition including an oleophilic base ink composition having dispersed therein particles of an infrared-absorbing material wherein the infrared-absorbing material is selected from reduced indium tin oxide, titanium nitride, zirconium nitride, molybdenum metal, copper chromate, lanthanum hexaboride, neodymium oxide, neodymium chloride, dysprosium oxide and praseodymium oxide.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: April 17, 2012
    Assignee: Inovink Limited
    Inventors: David Malcolm Lewis, Peter Jeffrey Broadbent