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US Patent: 1,297,990
Treadle Hammer
Patentee: William Blacker (exact or similar names) - Stalybridge, Chester County, England USPTO Classifications: 72/445, 72/446 Tool Categories: metalworking machines : forging machines : power hammers Assignees: None Manufacturer: Blacker Engineering Co. - New York, NY Witnesses: none listed	Patent Dates: Applied: Feb. 19, 1918 Granted: Mar. 25, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Blacker Engineering Co.

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