4. Bleaching and dyeing; fluid treatment and chemical modification
  5. Treatment of hides, skins, feathers and animal tissues
  6. Tanning

Pi-Chao Chang

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Craft knife for cutting circles

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Design Patent

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Dual-use circular knife

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Design Patent

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Measuring device

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate

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Rotary cutter

Cutlery – Cutting tools – Traveling roller blade
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2181021

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