4. Fire escape, ladder, or scaffold
  5. Pole or strand grasping-type climber
  6. Alternate grasping

Quality Steel Products, Inc.

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Motorized scaffold hoisting apparatus

Fire escape – ladder – or scaffold – Platform with elevating or lowering means – Suspended
Patent

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Pump jack handle assembly

Fire escape – ladder – or scaffold – Pole or strand grasping-type climber – Alternate grasping
Patent

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Pump jack pole assembly

Fire escape – ladder – or scaffold – Pole or strand grasping-type climber – Alternate grasping
Patent

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Pump jack with release mechanism

Fire escape – ladder – or scaffold – Pole or strand grasping-type climber – Alternate grasping
Patent

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