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US Patent: 1,335,721
Heavy squaring-clamp
Patentee: Oscar Bergstrom (exact or similar names) - Chicago, IL USPTO Classifications: 269/244, 269/250 Tool Categories: work holding : clamps Assignees: Handy Manufacturing Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: Dwight B. Cheever Minnie Sternberg	Patent Dates: Applied: Nov. 17, 1919 Granted: Apr. 06, 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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