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US Patent: 651,057
Steel Square
Patentee: Artemas Roberts (exact or similar names) - Normal, NE USPTO Classifications: 33/476, 33/DIG16 Tool Categories: layout tools : squares : carpenter squares Assignees: None Manufacturer: Sargent & Co. - New Haven, CT Witnesses: A. W. Woods Mary L. Kinsley	Patent Dates: Applied: Nov. 18, 1899 Granted: Jun. 05, 1900 Patent Pictures: [ 1 | 2 | 3 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen. "Vintage Machinery" entry for Sargent & Co.
Description: Table gives lengths of rafters having a defined pitch and a given horizontal run. Patent date seen marked on a Sargent & Co square and Henry B. Sargent references this patent in his patent 1,102,689. This patent appears on a Sargent VBM 500CR square (pic 2) with the 1,102,689 patent on the opposite side.

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