Top IPC subclasses
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1
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B01D
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2
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Separation
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2
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A23C
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2
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dairy products, e.g. milk, butter, cheesemilk or cheese substitutesmaking thereof
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3
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F25B
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2
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refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
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4
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A23L
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2
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Foods, foodstuffs, or non-alcoholic beverages, not covered by subclasses A21D or A23B-A23J; their preparation or treatment, e.g. cooking, modification of nutritive qualities, physical treatment; preservation of foods or foodstuffs, in general
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