4. Metal deforming
  5. By relatively receding work-engaging tool-faces
  6. Embodying three or more tools

Richard Gerretz

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Apparatus for testing pipes by a pipe tester

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Mechanical tube expander

Metal deforming – By relatively receding work-engaging tool-faces – Embodying three or more tools
Patent

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Tube expander

Metal deforming – By relatively receding work-engaging tool-faces – Embodying three or more tools
Patent

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