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US Patent: 74,750
Improvement in pistons
Patentees: Isaac Y. Chubbuck (exact or similar names) - Roxbury, MA S. E. Chubbuck (exact or similar names) - Roxbury, MA USPTO Classifications: 277/483, 277/487 Tool Categories: propulsion and energy : steam engines : steam engine pistons Assignees: S. E. Chubbuck, Jr. - Roxbury, MA Isaac Y. Chubbuck - Roxbury, MA S. E. Chubbuck - Roxbury, MA Manufacturer: S. E. Chubbuck & Sons - Roxbury, MA Witnesses: D. N. B. Coffin, Jr. Irah D. Spaulding	Patent Dates: Granted: Feb. 25, 1868 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for S. E. Chubbuck & Sons

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