Patents Assigned to Artech Plus Co., Ltd.
  • Composition for water-removable ink
    Patent number: 7294182
    Abstract: The present invention provides a composition for water-removable ink with an effect of coupling retardation by using an aliphatic alcohol as a solvent, which is selected from a group comprising n-butyl alcohol, n-propyl alcohol, isopropyl alcohol and pentanol, so that the curiosity of infants or juveniles can be stimulated to enhance the learning effect and also various desires of students or adults can be satisfied in terms of ornamental purposes.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: November 13, 2007
    Assignee: Artech Plus Co., Ltd.
    Inventors: Dong Kyun Jang, Dong Joo Kwon