4. Bridges
  5. Gangway, ramp, or dock leveler
  6. Attached

Magnum Construction Company, Inc.

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Apparatus and method for removing ballast stones from a roof

Material or article handling – Load-transporting type vehicle and external means... – Involving movement of load by gravity from wheeled vehicle
Patent

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Remote control crane/load safety shackle

Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Load releasing means
Patent

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Selectively-retractable elevated walkway extension

Bridges – Gangway – ramp – or dock leveler – Attached
Patent

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