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US Patent: 558,055
Tapping Attachment
Patentee:
Franklin Alfred Errington (exact or similar names) - Edgewater, Richmond County, NY

USPTO Classifications:
408/133, 470/103

Tool Categories:
metalworking machines : drilling and boring : tapping heads and chucks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 17, 1894
Granted: Apr. 14, 1896

Patent Pictures:
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