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US Patent: 1,052,921
Lifting-jack
Patentee: Isaiah E. Hindman (exact or similar names) - Crafton, PA USPTO Classifications: 254/103, 74/724 Tool Categories: Assignees: Duff Mfg. Co. - Pittsburgh, PA Manufacturer: Duff Mfg. Co. - Pittsburgh, PA Witnesses: George B. Bleming Jesse B. Heller	Patent Dates: Applied: Sep. 06, 1912 Granted: Feb. 11, 1913 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Duff Mfg. Co.

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