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Priority to ES1968137463UpriorityCriticalpatent/ES137463Y/en
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Publication of ES137463YpublicationCriticalpatent/ES137463Y/en
Folding ladder, characterized by comprising a frame of two pairs of parallel front beams and other back beams connected by crossbeams and which are articulated at one end, while on the other side are supported on the surface of the place of use of which stringers the fronts articulate to the rungs that, in turn, are joined to each other by braces forming articulated parallelograms, the upper rung being connected to two lateral stringers provided with paths, conjugate slots with respective pins of the rear stringers. (Machine-translation by Google Translate, not legally binding)