Steven Chang

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Bardonia, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Shuttle bobbin for sewing machines
- Patent number 6,311,912
- Issue date Nov 6, 2001
- Kosap Tech Co., Ltd.
- Steve Chang
- D05 - SEWING EMBROIDERING TUFTING
Information Patent Grant
Automatic dual bobbin mechanism
- Patent number 5,622,127
- Issue date Apr 22, 1997
- Steven Chang
- D05 - SEWING EMBROIDERING TUFTING