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US1292888A
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Automatic current-regulator for seam-welding machines.
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US1300603A
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Electric welding apparatus.
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US1292438A
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Adjustable electrode for electric riveting-machines.
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US1267481A
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Automatic switching or circuit-breaking device for electric welding or other metal-working apparatus.
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US1261327A
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Fastening metal plates in spaced relation.
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US1266084A
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Electric welding-machine.
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US1252746A
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Welding and annealing high-speed steel.
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US1253189A
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Welding high-speed steel.
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US1290367A
|
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Electric welding-machine.
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US1235524A
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Electric welding-machine.
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US1262975A
|
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Method of making collar-head screws or the like.
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US1297966A
|
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Electric riveting apparatus.
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US1297965A
|
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Electric riveting apparatus.
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US1225373A
|
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Method of electric welding.
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US1168346A
|
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Apparatus for electric welding.
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US1154933A
|
|
Electrically-welded tubing and process of making the same.
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US1083956A
|
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Electric seam-welding.
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US1122665A
|
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Spot-welding machine.
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US1097895A
|
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Spot-welding.
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US1085769A
|
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Spot-welding thin sheets.
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