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CA Patent: CA-3,767
Improvements in sash and door clamps
Patentee: Robert Lemuel Greenlee (exact or similar names) - Chicago, IL USPTO Classifications: Tool Categories: work holding : clamps woodworking machines : specialty woodworking machines : window making machines Assignees: William Abercrombie - Hamilton, ON Canada Manufacturer: Wm. Abercrombie - Hamilton, ON Canada Greenlee Brothers & Co. - Rockford, IL Witnesses: Unknown	Patent Dates: Granted: Aug. 22, 1874 Patent Pictures: CIPO Data Report data errors or omissions to steward Carl Matthews "Vintage Machinery" entry for Wm. Abercrombie "Vintage Machinery" entry for Greenlee Brothers & Co.
Description: This five-year patent was extended for a further five years by CA-10,367; see also U.S. patent 143,236.

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