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US Patent: 472,126
Eccentric Coupling and Tool and Work Holder
Patentee:
Andrew Johnson (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:
279/6, 464/103, 74/571.11

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 14, 1891
Granted: Apr. 05, 1892

Patent Pictures:
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