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US Patent: 143,236
Improvement in sash and door clamps
Patentee: Robert L. Greenlee (exact or similar names) - Chicago, IL USPTO Classifications: 269/113, 269/140, 269/159 Tool Categories: work holding : clamps Assignees: None Manufacturer: Greenlee Brothers & Co. - Rockford, IL Witnesses: Samuel Smith G. L. Chopin	Patent Dates: Applied: Nov. 16, 1872 Granted: Sep. 30, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Carl Matthews "Vintage Machinery" entry for Greenlee Brothers & Co.

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