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CA177752A
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Tube drawing machine
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US1175890A
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Apparatus for drawing tubes.
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US1100696A
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Apparatus for rolling seamless tubes.
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US1100695A
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Apparatus for making seamless tubes.
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US1006186A
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Method of making steel or alloy tubes.
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US1040569A
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Method of making seamless tubes.
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US999635A
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Method of reeling tubes.
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US988834A
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Tube-rolling.
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US829953A
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Cross-rolling apparatus.
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US810241A
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Apparatus for reducing the ends of tubes.
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US860232A
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Manufacture of compound pipes and tubes.
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US778816A
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Apparatus for making tubes.
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US658882A
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Mandrel mechanism for rolling billets into tubes.
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US654373A
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Tube-bending machine.
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US678753A
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Machine for drawing metal.
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US678789A
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Die for metal-drawing machines.
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