Dale Chang

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Taipei City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Self-teaching book for children with an electronic device
- Patent number 4,854,879
- Issue date Aug 8, 1989
- Dale Chang
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents

Information Patent Application
Kid learning instrument with rotating wheels
- Publication number 20040126744
- Publication date Jul 1, 2004
- Dale Chang
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS