Patents Assigned to Kawamura Seichu Kogyo Kabushiki Kaisha
  • Coloring composition for line- or pattern- drawing elements
    Patent number: 4030934
    Abstract: A coloring composition for line- or pattern-drawing elements which comprises as a base material thereof one or more acidic sublimating substances such as benzoic acid, salicylic acid and phthalic acid. Lines and/or patterns drawn with the coloring composition are easily erased by heating.
    Type: Grant
    Filed: April 24, 1975
    Date of Patent: June 21, 1977
    Assignee: Kawamura Seichu Kogyo Kabushiki Kaisha
    Inventor: Zenshiro IIjima