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Individual
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Individual
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Application filed by IndividualfiledCriticalIndividual
Priority to ES0034988UpriorityCriticalpatent/ES34988Y/en
Publication of ES34988UpublicationCriticalpatent/ES34988U/en
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Publication of ES34988YpublicationCriticalpatent/ES34988Y/en
A children's book with replaceable sheets that is characterized by the modality of link and sewing of its leaves, which is not fixed, but removable because of having in the center of the angular axis of its cover, a device that forms a rubber ring which penetrates through the central hole of a cardboard disc, retaining it by means of a metal pin. This disc, which bends angula lies on a diametral line, penetrates transversely in the perforation of its same measure that they have in all the pages of the book and, once it has penetrated in all of them, giving it a 90º turn, it is impossible of recoil, and by the tension of the rubber ring leaves locked and effected the format of the resulting booklet. (Machine-translation by Google Translate, not legally binding)
ES0034988U1953-02-251953-02-25
Children's book with interchangeable sheets
ExpiredES34988Y
(en)
West. Jr., Admirals of American Empire: The Combined Story of George Dewey, Alfred Thayet Mahan, Winfield Scott Schley, and William Thomas Scott Schley, and William Thomas Sampson (Book Review)
A calendar that determines the beginning and end of the gestation of different animal species (Machine-translation by Google Translate, not legally binding)