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ES20442A1897-02-231897-02-23Un aparato electro-magnético para regular máquinas de vapor, ruedas hidráulicas y otros aparatos análogos.
ExpiredES20442A1
(es)
Un nuevo aparato destinado a la elevación de pesos y especialmente la de todos cuantos vehículos existan y puedan existir para la locomoción, sea a fuerza animal, a vapor, a gas o a electricidad.