Sun L. Chang

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Tai Ping Hsiang, Taichung Hsien, TW

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Patents Grantslast 30 patents

Information Patent Grant
Loose-leaf binder
- Patent number 9,676,221
- Issue date Jun 13, 2017
- Sun L. Chang
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Loose-leaf binder device
- Patent number 9,669,648
- Issue date Jun 6, 2017
- Sun L. Chang
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Binding device for holding loose-leaf papers
- Patent number 4,773,787
- Issue date Sep 27, 1988
- Sun L. Chang
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER