Middle Ages - Blacksmithing was developed Combination of intense heat and hammering
19th Century - Modern welding first developed First arc between two carbon electrodes, Sir Humphrey Davy
1836 - Edmund Davy discovered acetylene gas
1890 - Carbon arc welding (CAW) First U.S. Patent, arc welding process, issued to C.L. Coffin
Late 1800s - Gas welding & cutting using acetylene, Resistance welding used in construction
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