Patents Assigned to Tsuen Lee Metals & Plastic Toys Co., Ltd.
  • Magnetic writing screen dispersion medium
    Patent number: 6878306
    Abstract: A magnetic dispersion medium is used in a magnetic writing screen toy. The dispersion medium is attracted to the underside of the screen when a magnetic tipped pen is passed over the upper surface of the screen. A user can create drawings and figures. The dispersion medium is non-toxic, creates lines having good contrast and can be easily erased without permanently forming black marks on the screen. The dispersion medium works well in temperature ranges between ?20° C. to 45° C.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: April 12, 2005
    Assignee: Tsuen Lee Metals & Plastic Toys Co., Ltd.
    Inventor: Tao Shi Gao