4. Fire escape, ladder, or scaffold
  5. Unitary foldable, rigid scaffold or ladder
  6. Collapsible ladder

Walter Kummerlin

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Hinge fitting for foldable ladders

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to hold or retard hinged members against...
Patent

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Ladder

Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Collapsible ladder
Patent

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Longitudinally variable ladder

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

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Supporting device for ladders

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

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Profile ID: LFUS-PAI-P-220495

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