4. Metal working
  5. Method of mechanical manufacture
  6. Electrical device making

Tsung-Wen Chen

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Glasses and glasses box

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Reexamination Certificate

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Glasses hinge structure

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
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Method for fabricating negative temperature coefficient...

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2374529

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