4. Education and demonstration
  5. Means for demonstrating apparatus, product, or surface...
  6. Chalkboard or equivalent means having easily erasable surface

Takao Kani

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Water-metachromatic cloth sheet, toy set using the same, and...

Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Reexamination Certificate

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Writing instrument for water-metachromatic members with...

Coating implements with material supply – Material flows through porous tool – Wick feed from within reservoir to tool
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2880127

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