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Method and apparatus for manufacturing a helically-wound...

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Reexamination Certificate

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Method and apparatus for portable spiral pipe manufacturing

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Method of making an hydraulically efficient ribbed pipe

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Method of making bellows pipe

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Method of making corrugated flexible metal tubing

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Method of manufacturing a metal carcass for a flexible pipe...

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Mobile pipe mill

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Pipe cutter with dual outer cutting knives and method

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Process and apparatus for forming oversized circular pipe

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Ribbed spiral pipe producing machine

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Spiral pipe forming machine with device for aligning spiralling

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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Spiral pipe machine

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Spirally formed pipe cutter with driving mechanism to...

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Reexamination Certificate

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System and method for corrugating spiral formed pipe

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Tank wall and method and system for making

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
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Wire-spiralling machine

Metal deforming – By tool-couple pressing together adjacent surface portions... – To form helically-seamed tube
Patent

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