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US Patent: AI84
Doorknob shank
Patentees: Calvin Adams (exact or similar names) - Unknown, Unknown John Jay Roggen (exact or similar names) - Unknown, Unknown Laureston R. Livingston (exact or similar names) - Unknown, Unknown USPTO Classifications: 292/358 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Dec. 11, 1847 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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