4. Electric heating
  5. Inductive heating
  6. Metal working

John Duncan Cruickshank

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Fluid pipelines

Pipe joints or couplings – With casing – lining or protector – Lined
Patent

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Induction heating apparatus and method for pipeline welding oper

Electric heating – Inductive heating – Metal working
Patent

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Pipeline pigging

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent

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Pipeline storage

Winding – tensioning – or guiding – Loop forming
Patent

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Vessel for laying rigid pipes at great depth

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1160830

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