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Collapsible tower system for antenna or the like

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Patent

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Column-mounted appliances

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Compact sectionalized drilling mast, power arrangement and suppo

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Construction apparatus with pivotable mast

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Reexamination Certificate

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Control system for telescopic boom

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Crane boom and telescopic section for it

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Crane boom extending, retracting and cooperative latching arrang

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Crane boom of trapezoidal boom sections having reinforcing rings

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Crown bumper

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Reexamination Certificate

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Deployable structural assemblies, systems for deploying such...

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Longitudinally extensible by flexible drive or hoist
Reexamination Certificate

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Deployable/retractable telescoping mast assembly and method

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – With spring-actuated return
Patent

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Derrick having upper and lower crown block positions

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Device for erecting and aligning a tilting telescopic mast mount

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Device for raising and lowering elongated support structures

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Device raising and lowering apparatus

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Double cylinder over-center aerial device

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Drill mast support assembly

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Fluid pressure actuated
Patent

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Drilling derrick assembly

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Drilling equipment tower raising mechanism

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Drilling ramp

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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