Top IPC subclasses
1
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B03C
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4
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magnetic or electrostatic separation of solid materials from solid materials or fluidsseparation by
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2
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F24J
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3
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Production or use of heat not otherwise provided for
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3
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B01D
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1
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Separation
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4
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F03D
|
1
|
Wind motors
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5
|
F03G
|
1
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spring, weight, inertia, or like motorsmechanical-power-producing devices or mechanisms, not otherwi
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