4. Geometrical instruments
  5. Scriber
  6. Curved line

Yen-Hung Wu

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Conic section compass

Geometrical instruments – Scriber – Curved line
Patent

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Motor driving circuit and motor driving method

Electricity: motive power systems – Armature circuit control – Voltage control
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1818876

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