Top IPC subclasses
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1
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G09B
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5
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educational or demonstration appliancesappliances for teaching, or communicating with, the blind, de
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2
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H02M
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4
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apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use wit
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3
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C25B
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2
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Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
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4
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G08B
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1
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signalling or calling systemsorder telegraphsalarm systems
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5
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G01N
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1
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Investigating or analysing materials by determining their chemical or physical properties
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6
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A01G
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1
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Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops, or seaweed; forestry; watering
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