US933572A
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Manufacture of salt.
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GB190625404A
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Improvements relating to the Manufacture of Salt.
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GB190622327A
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Improvements relating to the Manufacture of Salt.
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GB190609223A
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Improvements in or connected with "Drawing" Tubes or Hollow Bodies.
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GB190605306A
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Improvements in or connected with the Manufacture of Tubes or Hollow Cylinders.
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CA101586A
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Manufacture of tubes, etc.
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CA92357A
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Manufacture of tubes or hollow bodies
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US920168A
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Manufacture of tubes or hollow bodies.
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US861880A
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Apparatus for the manufacture of metal tubes.
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GB190405873A
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Improvements in or connected with the Manufacture of Tubes or Hollow Cylinders.
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GB190323696A
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Improvements in or connected with the Manufacture of Tubes.
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GB190317020A
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Improvements in or connected with the Manufacture of Metal Tubes or Hollow Bodies.
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US763566A
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Manufacture of tubes or hollow bodies.
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US765673A
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Manufacture of tubes or hollow bodies.
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GB190306441A
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Improvements in or connected with the Manufacture of Tubes or Hollow Bodies.
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CA85171A
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Manufacture of tubes or hollow bodies
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CA82949A
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Machinery for making tubular articles
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US880563A
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Apparatus for drawing hard-metal tubes.
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US705780A
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Metal-piercing machinery for making hollow bodies.
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US771883A
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Machinery for making seamless metal tubes, &c.
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