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Individual
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Individual
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Priority to ES98395UpriorityCriticalpatent/ES98395Y/en
Publication of ES98395UpublicationCriticalpatent/ES98395U/en
Application grantedgrantedCritical
Publication of ES98395YpublicationCriticalpatent/ES98395Y/en
A bookbinding spine ring, essentially characterized by being formed by a flexible longitudinal part of uniform section in its central area, presented at one end an extension according to a coaxial spike and at the opposite an axial entry whose section corresponds to that of the spike that indistinctly can be round or prismatic. (Machine-translation by Google Translate, not legally binding)
ES98395U1963-03-201963-03-20
Spine hoop for sheet binding
ExpiredES98395Y
(en)