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US Patent: RE5,401
Improvement in machines for forming building-blocks
Patentee: Josiah S. Elliott (exact or similar names) - Chelsea, MA USPTO Classifications: 425/424 Tool Categories: Assignees: Union Stone Co. - Boston, MA Manufacturer: Not known to have been produced Witnesses: William W. Swan H. Farnam Smith	Patent Dates: Applied: Dec. 24, 1872 Granted: May 13, 1873 Reissue Information: Reissue of 111,921 (Feb. 21, 1871) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Union Stone Co.

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