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US1582549A
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Electric welding machine
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US1460928A
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Tubular frame
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GB187561A
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An improved construction of electrode for electric welding
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GB188690A
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An improved method of electrically butt-welding apparatus for and tubing produced thereby
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GB189072A
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An improved construction of welding throat
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US1433852A
|
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Electrical collecting-brush structure
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US1479564A
|
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Apparatus for shaping tubular stock lengths
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US1420720A
|
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Welding apparatus
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US1414530A
|
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Welding apparatus
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US1293486A
|
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Welding device.
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US1321655A
|
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Fender-bar for automobiles and the like.
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US1184974A
|
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Tube-polishing mechanism.
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US1141068A
|
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Art of welding.
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US1120209A
|
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Process of manufacturing metal tubing.
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US1124766A
|
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Tube-welding process.
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US1141067A
|
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Reinforced tubing.
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US1184973A
|
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Deburring mechanism for welded tubing and the like.
|
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US1124765A
|
|
Tube-welding mechanism.
|
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US1132185A
|
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Apparatus for making c-bars.
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US1128839A
|
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Gate.
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