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US Patent: 1,930,343
Clamp tightening machine
Patentee: John M. Hargrave (exact or similar names) - Cincinnati, OH USPTO Classifications: 269/152, 269/26, 81/56, 81/57.24 Tool Categories: work holding : clamps : clamp carriers Assignees: None Manufacturer: Cincinnati Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Aug. 13, 1929 Granted: Oct. 10, 1933 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.

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