Patents Assigned to Helmut Hung GmbH
  • Toothbrush head with means to direct and collect radiation
    Patent number: 6862771
    Abstract: A toothbrush head suitable to direct incident radiation toward a surface of a tooth and to collect emitted radiation from the surface of the tooth, being made at least in past of a material which is transparent to the incident and/or emitted radiation. In preferred embodiments the head includes one or more radiation guiding cores of transparent material.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: March 8, 2005
    Assignees: SmithKline Beecham GmbH & Co. KG, Helmut Hung GmbH
    Inventor: Werner Muller