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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:
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