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Individual
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Individual
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Priority to ES8188ApriorityCriticalpatent/ES8188A1/en
Publication of ES8188A1publicationCriticalpatent/ES8188A1/en
ES8188A1888-04-241888-04-24
Improvements in electrical devices so that the compass gives an alarm signal when the ship drifts from its course.
ExpiredES8188A1
(en)