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US Patent: 154,976
Drawing Protracter, Sliding T-Square, etc.
Patentee: S. Milton York (exact or similar names) - Toledo, OH USPTO Classifications: 33/403, D10/65 Tool Categories: layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: George A. Tibbitts M. Rogers	Patent Dates: Applied: Jan. 24, 1874 Granted: Sep. 15, 1874 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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