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Priority to JP6349375ApriorityCriticalpatent/JPS57828B2/ja
Publication of JPS51106398ApublicationCriticalpatent/JPS51106398A/ja
Publication of JPS57828B2publicationCriticalpatent/JPS57828B2/ja
E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
E06C—LADDERS
E06C1/00—Ladders in general
E06C1/02—Ladders in general with rigid longitudinal member or members
E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other