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Priority to ES55681ApriorityCriticalpatent/ES55681A1/en
Publication of ES55681A1publicationCriticalpatent/ES55681A1/en
ES55681A1913-05-291913-05-29
A counter device for electric fluid, both in direct and alternating current, entitled "Chrono-Vatt-Meter".
ExpiredES55681A1
(en)