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US Patent: 592,912
Centering Drill Chuck
Patentee:
Morgan Johnson (exact or similar names) - Hartford, Hartford County, CT

USPTO Classifications:
408/112, 408/84

Tool Categories:
metalworking machines : drilling and boring : drill presses : drill press chucks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 05, 1897
Granted: Nov. 02, 1897

Patent Pictures:
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