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US Patent: 152,335
Improvement in piston-packing
Patentees: Stillman E. Chubbuck (exact or similar names) - Boston, MA Isaac Y. Chubbuck (exact or similar names) - Boston, MA USPTO Classifications: 277/483 Tool Categories: propulsion and energy : steam engines : steam engine pistons : piston ring and packing Assignees: None Manufacturer: S. E. Chubbuck & Sons - Boston, MA Witnesses: Charles A. Pettit Solon C. Kemon	Patent Dates: Applied: May 18, 1874 Granted: Jun. 23, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for S. E. Chubbuck & Sons

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