Ching-Hwa Chang

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Tun-Cherng City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Method for treating spent tin/lead stripping solution
- Patent number 6,685,820
- Issue date Feb 3, 2004
- Amia Co., Ltd.
- Kuo-Chin Chen
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
Method for treating spent tin/lead stripping solution
- Publication number 20030200838
- Publication date Oct 30, 2003
- Kuo-Chin Chen
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR