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US Patent: 306,690
Bit-stock (chuck)
Patentee: Richard D. Johnson (exact or similar names) - Springfield, MA USPTO Classifications: 279/40, 403/301, 403/341, 403/351 Tool Categories: Assignees: Leonard L. Davis - Springfield, MA Manufacturer: Davis Tool and Level Co. - Springfield, MA Witnesses: Unknown	Patent Dates: Granted: Oct. 14, 1884 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Kirk Eppler Vintage Machinery entry for Leonard L. Davis

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