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US Patent: 921,736
Pantograph Engraving Machine
Patentees: Joseph Tweedale (exact or similar names) - Dinting, Derby County, England John Pryke (exact or similar names) - Dinting, Derby County, England USPTO Classifications: 144/144.1, 173/20, 409/90, 72/438 Tool Categories: metalworking machines : metal engraving machines layout tools : pantographs Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 07, 1907 Granted: May 18, 1909 Reissue Information: Reissued as RE12,990 (Jul. 13, 1909) Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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