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US Patent: 1,165,380
Lifting-jack
Patentees: Isaiah E. Hindman (exact or similar names) - Oakmont, PA Walter McH. Alston (exact or similar names) - Ben Avon, PA USPTO Classifications: 254/111, 74/152 Tool Categories: Assignees: Duff Mfg. Co. - Pittsburgh, PA Manufacturer: Duff Mfg. Co. - Pittsburgh, PA Witnesses: Joseph A. Lane George A. Young	Patent Dates: Applied: Mar. 03, 1915 Granted: Dec. 28, 1915 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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