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Priority to ES0054207UpriorityCriticalpatent/ES54207Y/en
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Publication of ES54207YpublicationCriticalpatent/ES54207Y/en
Geographical distances booklet, characterized by disks that can rotate concentrically and of which the upper one has a geographical map indicating a certain number of geographical places with its name and next to it a window through which you can see a cut out of the lower disk with inscription of figures representing geographical distances by land, sea and air from a freely eligible place to all other places marked on the map with windows. (Machine-translation by Google Translate, not legally binding)
ES0054207U1956-05-121956-05-12
Directory of geographical distances
ExpiredES54207Y
(en)