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Individual
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Individual
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Priority to ES68657ApriorityCriticalpatent/ES68657A1/en
Publication of ES68657A1publicationCriticalpatent/ES68657A1/en
ES68657A1919-01-021919-01-02
An electro-mechanical government system of railway points and signals, by means of the apparatus described.
ExpiredES68657A1
(en)