4. Building units and construction elements
  5. Stair, ladder, scaffold, or similar support
  6. Element or attachment

Douglas A. Kennett

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Ladder stabilizer

Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent

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Ladder stabilizer

Fire escape – ladder – or scaffold – Ladder – With spacer means
Patent

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Ladder stabilizer leg

Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Design Patent

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Stabilizing attachment for ladders

Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent

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Profile ID: LFUS-PAI-P-740763

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