4. Fire escape, ladder, or scaffold
  5. Safety device, platform associated
  6. Railing

John Lawrence Dean

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Safety apparatus

Fire escape – ladder – or scaffold – Safety device – platform associated – Railing
Reexamination Certificate

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Safety apparatus for arresting the fall of a worker

Fire escape – ladder – or scaffold – Torso harness
Reexamination Certificate

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Safety post

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

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Profile ID: LFUS-PAI-P-2763024

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