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Individual
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Individual
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Priority to ES0006839UpriorityCriticalpatent/ES6839U/en
Publication of ES6839UpublicationCriticalpatent/ES6839U/en
A new didactic toy characterized essentially by being constituted by two series of sheets of cardboard or other appropriate material formed by an equal number of sheets each of them of equal size and whose number can be variable; containing the first series on one side capricious drawings of animal figures etc; said leaves being bored horizontally and vertically forming equal rectangles so that they can be subdivided into fragments on the back of each of which an indicated operation of one of the four fundamental rules of arithmetic appears printed so that the one who uses the toy can mentally perform the operation ; whose result consists in the complementary sheet of the second series on which, or following its pattern, the fragments will be placed in correspondence with the operations indicated with the consigned results, with which the drawings will be reconstructed. (Machine-translation by Google Translate, not legally binding)
ES0006839U1941-09-181941-09-18A new didactic toy (Machine-translation by Google Translate, not legally binding)
PendingES6839U
(en)