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US Patent: 304,601
Combined Square, Level and Triangle
Patentee: F. W. Gustav Boettcher (exact or similar names) - Milwaukee, WI USPTO Classifications: 33/343, 33/427 Tool Categories: layout tools : squares : bevel squares layout tools : levels : machinist levels Assignees: None Manufacturer: Unknown Witnesses: E. G. Asmus H. G. Underwood	Patent Dates: Applied: Feb. 18, 1884 Granted: Sep. 02, 1884 Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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