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US Patent: 302,685
Calipers
Patentee: Wilson P. Dodson (exact or similar names) - Philadelphia, PA USPTO Classifications: 33/558.01 Tool Categories: layout tools : calipers Assignees: Alexander H. Ege - Mechanicsburg, PA Wilson P. Dodson - Philadelphia, PA Manufacturer: Charles N. Dunham - Philadelphia, PA Witnesses: Charles N. Dunham Oscar R. Meyers	Patent Dates: Applied: Feb. 20, 1884 Granted: Jul. 29, 1884 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: The example shown is marked "C.N. Dunham Phila."

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