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US Patent: 477,559
Power Hammer
Patentee: William Hartill Law (exact or similar names) - Peterborough, Peterborough County, ON, Canada USPTO Classifications: 72/431, 72/441, 72/451 Tool Categories: metalworking machines : forging machines : power hammers Assignees: None Manufacturer: Central Bridge & Engineering Co. - Peterborough, Peterborough County, ON, Canada Witnesses: Lewis P. Abell Blanche Boyd L. Houlk	Patent Dates: Applied: Dec. 11, 1891 Granted: Jun. 21, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Central Bridge & Engineering Co.
Description: This machine was patented in Canada, patent #-CA-39,771.

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