US2016380A
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Method of welding
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US1905479A
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Method of electric welding
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US1865532A
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Welding machine
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US1906323A
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Electric welding machine
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US1905478A
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Method of electric welding
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US1905480A
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Means for electric welding
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US1889414A
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Welding apparatus
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US1865531A
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Means for lap-welding
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US1865530A
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Method of lap welding
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US1865529A
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Method of and means for welding
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US1913714A
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Ferrule for electric welding
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US1889413A
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Electric welding machine
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US1913713A
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Electric welding machine
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US1676656A
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Resistance welding electrode
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US1594891A
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Transformer for electric welding
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US1537177A
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Welding tubes
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US1271187A
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Means for protecting conduit or pipe threads.
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US1275279A
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Conduit or conductor.
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US1090926A
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Electroplating apparatus.
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US1022794A
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Support for articles to be electroplated.
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