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US Patent: 193,331
Machine for routing stair stringers
Patentee: Charles J. Harder (exact or similar names) - San Francisco, CA USPTO Classifications: 144/136.1, 144/3.1 Tool Categories: woodworking machines : cutter head machines : routing machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 09, 1877 Granted: Jul. 24, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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