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US1510586A
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Machine for forming metal tubes
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US1465073A
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Process of producing seamless internally-ribbed tubes
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US1123178A
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Manufacture of seamless tubes.
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US931043A
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Cutting-off machine.
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US928946A
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Machine for reducing the walls of tubular billets and for other uses.
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US927716A
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Machine for straightening tubes and for other uses.
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US938646A
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Method or process of forming metallic tubes.
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US787612A
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Method of shaping metallic ingots by transverse rolling.
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US829100A
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Mechanism for piercing or shaping metallic ingots.
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US755629A
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Process of annealing steel.
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US662146A
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Mechanism for rolling.
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US697988A
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Piercing and shaping metallic ingots.
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US1123179A
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Apparatus for cross-rolling round bodies.
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