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US Patent 7806233 Access ladder and method

Patent 7806233 was granted and assigned to Werner Co. on October, 2010 by the United States Patent and Trademark Office.

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Patent
Patent

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Current Assignee
‌
Werner Co.
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7806233
Date of Patent
October 5, 2010
Patent Application Number
11009895
Date Filed
December 9, 2004
Patent Citations Received
‌
US Patent 11834908 Interlocking ladders and components thereof
0
Patent Primary Examiner
‌
Alvin C Chin-Shue
Patent abstract

An access ladder for an access hole in a building includes a plurality of sections which telescope relative to each other between an extended position, where the sections define a plane and a user can climb the sections, and a retracted position where the sections are folded on each other. Several of the sections have a least one step which preferably moves between an unfolded position where the user can stand on the step when the sections are in the extended position, and a folded position when the sections are in the retracted position. Each section slides relative to another section of the plurality of sections which it is in contact in order for the sections to telescope. A method for using an access ladder attached to an end of an access hole of a building.

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