US Patent 11280133 7000 series aluminum alloy ladder, multipurpose ladder and method
Patent 11280133 was granted and assigned to Werner Co. on March, 2022 by the United States Patent and Trademark Office.
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Patent Number
112801330
Date of Patent
March 22, 2022
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158839580
Date Filed
January 30, 2018
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112801330
Date of Patent
March 22, 2022
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158839580
Date Filed
January 30, 2018
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US Patent 11280133 7000 series aluminum alloy ladder, multipurpose ladder and method
Article
A ladder and a multipurpose ladder whose rungs and rails are made out of 7000 series aluminum alloy and which has a duty rating of at least 250 lbs. A method for producing a ladder. A method for using a ladder.
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Patent number
11280133
Date of patent
March 22, 2022
Patent application number
15883958
Date Filed
January 30, 2018
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