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US Patent: 470,912
Calipers
Patentee: William F. Durand (exact or similar names) - Lansing, MI USPTO Classifications: 33/203.16, 33/550, 33/555.1, 33/557 Tool Categories: layout tools : calipers layout tools : special purpose gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: W. H. Van Dewoort W. A. Hamilton	Patent Dates: Applied: Apr. 24, 1891 Granted: Mar. 15, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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