Title: Colour changeable pen
Application Number: 85103428 Application Date: 1985.04.23
Publication Number: 1004233 Publication Date: 1986.10.22
Approval Pub. Date: Granted Pub. Date: 1990.02.07
International Classifi-cation: B43K27/00,C09D13/00
Applicant(s) Name: Shen Fugen Address:
Inventor(s) Name:
Attorney & Agent:
Abstract:
     Using the production technique of existing single-colour pen a variable colour pen which may write or paint with any colour can be made. By the principle that any colour may be composed from the three primary colours the red, yellow and blue refills are combined into one pen with their nibs placed very close to each other, but not in contact. It can be used for primary and middle school students in their art and geography classes, drawing and filling up pictures with various colors. It can be used also to make coloured marks on books or on products in reading and production.
Time: 8
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