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US Patent: 979,589
Variable-speed driving mechanism
Patentee: Radford Stockbridge (exact or similar names) - Worcester, MA USPTO Classifications: 384/249, 409/320, 74/600 Tool Categories: metalworking machines : metal shapers Assignees: Radford Stockbridge - Worcester, MA Arthur W. Beaman - Worcester, MA Manufacturer: Stockbridge Machine Co. - Worcester, MA Witnesses: Rufus B. Fowler Penelope Comberbach	Patent Dates: Applied: Apr. 28, 1906 Granted: Dec. 27, 1910 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Stockbridge Machine Co.

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