Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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2250/00
Fuel cells for particular applications; Specific features of fuel cell system
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H01M2250/40
Combination of fuel cells with other energy production systems
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H01M2250/405
Cogeneration of heat or hot water
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