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CA Patent: CA-36,927
Coil spring power hammer
Patentee: Philippe Dènéry Dupont (exact or similar names) - St. Johnsbury, VT USPTO Classifications: Tool Categories: metalworking machines : forging machines : drop hammers Assignees: None Manufacturer: E. & T. Fairbanks & Co. - St. Johnsbury, VT Plessisville Foundry - Plessisville, QC Canada Dupont Mfg. Co. - St. Johnsbury, VT Witnesses: Archil J. Dutile Austin Howe	Patent Dates: Granted: Jul. 04, 1891 Patent Pictures: CIPO Data Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for E. & T. Fairbanks & Co. Vintage Machinery entry for Dupont Mfg. Co. Vintage Machinery entry for Plessisville Foundry
Description: This is, roughly, the Canadian equivalent of US patent 429,807.

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