Top IPC subclasses
1
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B82B
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1
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nano-structuresmanufacture or treatment thereof
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2
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H01L
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1
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Semiconductor devices; electric solid state devices not otherwise provided for
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3
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C25F
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1
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processes for the electrolytic removal of materials from objectsapparatus therefor
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4
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C01D
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1
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compounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium
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