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PCE
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Search for IPC and CPC classification codes or keywords
CPC Subgroup
H01M 8/0656

by electrochemical means (H01M8/065 takes precedence)

Full Title

Fuel cells; Manufacture thereof > Combination of fuel cells with means for production of reactants or for treatment of residues (regenerative fuel cells H01M8/18) > with means for production of gaseous reactants > by electrochemical means (H01M8/065 takes precedence)