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US Patent: 140,852
Improvement in clamps
Patentee: John E. Sinclair (exact or similar names) - Worcester, MA USPTO Classifications: 269/166, 269/221, 269/238 Tool Categories: work holding : clamps Assignees: None Manufacturer: Not known to have been produced Witnesses: Joseph S. Rogers E. P. Barber	Patent Dates: Applied: Nov. 11, 1872 Granted: Jul. 15, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Carl Matthews

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