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Individual
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Individual
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Priority to ES33273ApriorityCriticalpatent/ES33273A1/en
Publication of ES33273A1publicationCriticalpatent/ES33273A1/en
ES33273A1904-01-211904-01-21
A device called the Orive electric annunciator, designed to signal the entire alphabet by means of lamps.
ExpiredES33273A1
(en)