4. Metal treatment
  5. Compositions
  6. Heat treating

Claude R. Wallick, Jr.

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Foldable ladder structure and method of manufacturing the same

Fire escape – ladder – or scaffold – Ladder with pivoted prop
Patent

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Ladder leg extender and leveler

Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Patent

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Method and apparatus for treating ladder rungs for forming assem

Metal treatment – Compositions – Heat treating
Patent

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Method of manfacturing a foldable ladder structure

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Rung lock and latch assembly for an extension ladder

Fire escape – ladder – or scaffold – Ladder – Extension
Patent

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Profile ID: LFUS-PAI-P-538894

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