Top IPC subclasses
1
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C23D
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1
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enamelling of, or applying a vitreous layer to, metals
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2
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C03C
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1
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chemical composition of glasses, glazes, or vitreous enamelssurface treatment of glasssurface treatm
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3
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A01K
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1
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animal husbandrycare of birds, fishes, insectsfishingrearing or breeding animals, not otherwise prov
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