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SAFON CALBE LUIS
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SAFON CALBE LUIS
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Priority to ES0025315UpriorityCriticalpatent/ES25315Y/en
Publication of ES25315UpublicationCriticalpatent/ES25315U/en
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Publication of ES25315YpublicationCriticalpatent/ES25315Y/en
Double calculating case, characterized by being constituted by a cylinder that rotates around its axis, carrying on its surface the results of the operation to be made, the lines indicating the amplitude of the turn and, at one end, one of the data of the operation. (Machine-translation by Google Translate, not legally binding)