Top IPC subclasses
1
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F24J
|
15
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Production or use of heat not otherwise provided for
|
2
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F24H
|
5
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fluid heaters, e.g. water or air heaters, having heat-generating means, in general
|
3
|
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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A23B
|
2
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preserving, e.g. by canning, meat, fish, eggs, fruit, vegetables, edible seedschemical ripening of f
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5
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F28D
|
2
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heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do n
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6
|
E04B
|
2
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General building constructions; walls, e.g. partitions; roofs; floors; ceilings; insulation or other protection of buildings
|
7
|
F03D
|
1
|
Wind motors
|
8
|
F25D
|
1
|
refrigeratorscold roomsice-boxescooling or freezing apparatus not covered by any other subclass
|
9
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A23N
|
1
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machines or apparatus for treating harvested fruit, vegetables, or flower bulbs in bulk, not otherwi
|
10
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E04H
|
1
|
buildings or like structures for particular purposesswimming or splash baths or poolsmastsfencingten
|
11
|
A23L
|
1
|
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
|
12
|
F24S
|
1
|
|