Top IPC subclasses
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1
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B24D
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3
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tools for grinding, buffing, or sharpening
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2
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C25D
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3
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processes for the electrolytic or electrophoretic production of coatingselectroformingjoining workpi
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3
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C25C
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2
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processes for the electrolytic production, recovery or refining of metalsapparatus therefor
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4
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G09B
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2
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educational or demonstration appliancesappliances for teaching, or communicating with, the blind, de
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5
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F03D
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1
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Wind motors
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6
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C01B
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1
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non-metallic elementscompounds thereof
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7
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B23H
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1
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Working of metal by the action of a high concentration of electric current on a workpiece using an electrode which takes the place of a tool; such working combined with other forms of working of metal
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