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US Patent: 490,502
Attachment for mortising-machines
Patentee: Harry Robinson (exact or similar names) - St. Louis, MO USPTO Classifications: 144/84 Tool Categories: woodworking machines : joint making machines : mortising machines woodworking machines : wood drilling and boring : mortising machines Assignees: None Manufacturer: Not known to have been produced Witnesses: C. K. Jones Herbert S. Robinson	Patent Dates: Applied: Jun. 20, 1892 Granted: Jan. 24, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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