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Patent classifications
A
HUMAN NECESSITIES
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A44
HABERDASHERY; JEWELLERY
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A44C
PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
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27/00
Making jewellery or other personal adornments
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A44C27/001
Materials for manufacturing jewellery
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A44C27/005
Coating layers for jewellery
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