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US Patent: 141,380
Improvement in machines for shaping piano-keys
Patentee: Milon Pratt (exact or similar names) - Deep River, CT USPTO Classifications: 144/146 Tool Categories: trade specific : music instrument maker woodworking machines : specialty woodworking machines Assignees: None Manufacturer: Not known to have been produced Witnesses: John W. Marvin S. H. Jennings	Patent Dates: Applied: May 23, 1873 Granted: Jul. 29, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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