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US Patent: 224,962
Parallel Ruler
Patentee: Charles D. Sigsbee (exact or similar names) - Washington, DC USPTO Classifications: 33/454 Tool Categories: rules : parallel rules Assignees: None Manufacturer: Unknown Witnesses: William C. McIntire F. W. Smith, Jr.	Patent Dates: Applied: Nov. 07, 1879 Granted: Feb. 24, 1880 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)

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