US2063407A
|
|
Electric heating device
|
US1744284A
|
|
Welding and forging by electric-resistance method
|
US1714962A
|
|
Means for regulating secondary current and voltage in transformers
|
US1715017A
|
|
Electric welding apparatus
|
US1736617A
|
|
Mechanically-operated butt welder
|
US1576169A
|
|
Method of electric welding
|
US1578658A
|
|
Method of removing the burr formed in welding
|
US1503827A
|
|
Process of welding cast iron to steel
|
US1470160A
|
|
Chain-link welding
|
US1452942A
|
|
Chain-link welding
|
US1490647A
|
|
Process of making endless metal forms
|
US1462572A
|
|
Condensing welding circuit
|
US1363356A
|
|
Method of butt-welding tubing
|
US1382906A
|
|
Self-heating rivet and method of riveting with same
|
US1363355A
|
|
Method of uniting cable ends
|
US1358428A
|
|
Electric metal-working apparatus
|
US1355206A
|
|
Manufacture of articles of rubber
|
US1498222A
|
|
Method of heating vulcanizers
|
US1382905A
|
|
Cooling means for electric metal-working transformers
|
US1344961A
|
|
Electric metal-working apparatus
|