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Individual
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Priority to ES110837UpriorityCriticalpatent/ES110837Y/en
Publication of ES110837UpublicationCriticalpatent/ES110837U/en
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Publication of ES110837YpublicationCriticalpatent/ES110837Y/en
Educational clock characterized in that it is made up of a base that acts as a sphere which in the vicinity of its periphery has twelve holes in the places corresponding to the hours that are numbered from five to five starting at five and ending at sixty; the hollows each have a series of projections different from each other;/its central part has the sphere an axis in which they are mounted. all two needles. (Machine-translation by Google Translate, not legally binding)
ES110837U1965-01-191965-01-19
AN EDUCATIONAL CLOCK.
ExpiredES110837Y
(en)
Improved device for aeration of enclosures determined by translucent concrete partitions (Machine-translation by Google Translate, not legally binding)