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

Joon Ho Chang

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Core drill

Machines not elsewhere specified – Material working – abrading – or founding machinery – Element or attachment
Design Patent

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Grinding cup

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

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Grinding cup

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

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Grinding wheel

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

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Grinding wheel with segments for preventing one-sided wear

Abrading – Rigid tool – Rotary disk
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2546206

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