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US Patent: 2,245,089
Welder's clamp
Patentee: John M. Hargrave (exact or similar names) - Cincinnati, OH USPTO Classifications: 269/249, 269/286 Tool Categories: trade specific : welder work holding : clamps : C clamps Assignees: None Manufacturer: Cincinnati Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Oct. 25, 1939 Granted: Jun. 10, 1941 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Carl Matthews
Description: Inventor Hargrave was the president of Cincinnati Tool Co. The innovation is a clamp where the screw is made of a material, such as silicon manganese bronze, to which ferrous welding spatter will not adhere.

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