Top IPC subclasses
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1
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F22B
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4
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methods of steam generationsteam boilers
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2
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A23L
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4
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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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3
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F26B
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2
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Drying solid materials or objects by removing liquid therefrom
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4
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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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5
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A23N
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1
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machines or apparatus for treating harvested fruit, vegetables, or flower bulbs in bulk, not otherwi
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