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US Patent: 100,066
Improvement in steelyards
Patentee: William B. Preston (exact or similar names) - North Chelsea, MA USPTO Classifications: 177/251 Tool Categories: specialty tools : scales and balances Assignees: None Manufacturer: Wm. B. Preston - Boston, MA Witnesses: C. Warren Brown J. B. Crosby	Patent Dates: Granted: Feb. 22, 1870 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: The example shown has a brass arm 18 inches long, and the head is marked with the patent date and "Wm. B. Preston, 91 Union St., Boston".

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