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US Patent: 399,470
Lifting-jack
Patentee: Josiah Barrett (exact or similar names) - Allegheny, PA USPTO Classifications: 254/111, 74/169 Tool Categories: metalworking tools : lifting jacks Assignees: Duff Mfg. Co., Ltd. - Allegheny, PA Manufacturer: Duff Mfg. Co., Ltd. - Allegheny, PA Witnesses: Darwin S. Wolcott R. H. Whittlesey	Patent Dates: Applied: Jan. 02, 1885 Granted: Mar. 12, 1889 Reissue Information: Reissued as RE11,051 (Dec. 31, 1889) 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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