Top IPC subclasses
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1
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F25B
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10
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refrigeration machines, plants, or systemscombined heating and refrigeration systemsheat pump system
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2
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A23C
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4
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dairy products, e.g. milk, butter, cheesemilk or cheese substitutesmaking thereof
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3
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A01G
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4
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Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
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4
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G09B
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3
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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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G01K
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2
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measuring temperaturemeasuring quantity of heatthermally-sensitive elements not otherwise provided f
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6
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F24J
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1
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Production or use of heat not otherwise provided for
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7
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F28F
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1
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details of heat-exchange or heat-transfer apparatus, of general application
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8
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H01L
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1
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Semiconductor devices; electric solid state devices not otherwise provided for
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9
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F28D
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1
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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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