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US Patent: 17,991
Adjustment for Try Squares
Patentee: Joel Whitney (exact or similar names) - Winchester, MA USPTO Classifications: 33/480 Tool Categories: layout tools : squares : try squares Assignees: None Manufacturer: Not known to have been produced Witnesses: Chas. W. Hawkes Saml. G. Parsons	Patent Dates: Granted: Aug. 11, 1857 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Utilizes a flattened pin in a slot with a eccentric pin or order to adjust the blade.

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