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GB Patent: GB-186,400,206
Atmospheric Hammer
Patentee: William Dakin Grimshaw (exact or similar names) - Mitcham, Surrey County, England USPTO Classifications: Tool Categories: metalworking machines : forging machines : power hammers Assignees: None Manufacturer: Thomas Whitfield and Co. - Birmingham, England Witnesses: Unknown	Patent Dates: Granted: Jan. 25, 1864 Patent Pictures: Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Thomas Whitfield & Co.
Description: Also, see patent #45,896.

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