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US Patent: 477,105
Caliper Rule
Patentee: Samuel Darling (exact or similar names) - Providence, RI USPTO Classifications: 33/812 Tool Categories: layout tools : measurement gauges Assignees: None Manufacturer: Darling, Brown & Sharpe - Providence, RI Witnesses: Herbert Scholfield Socrates Scholfield	Patent Dates: Applied: Oct. 06, 1891 Granted: Jun. 14, 1892 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Brown & Sharpe Mfg. Co.

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