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US Patent: 1,334,732
Revolving case-clamp
Patentee: Oscar Bergstrom (exact or similar names) - Chicago, IL USPTO Classifications: 269/252 Tool Categories: work holding : clamps Assignees: Handy Manufacturing Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 09, 1919 Granted: Mar. 23, 1920 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Carl Matthews "Vintage Machinery" entry for Handy Manufacturing Co.

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