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US Patent: 106,551
Threading Screws
Improved Chuck for Holding Pipes and Tubes while being Screw-Threaded
Patentee:
William T. Cole (exact or similar names) - New York, NY

USPTO Classifications:
470/79

Tool Categories:
specialty machines : pipe making machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Aug. 23, 1870

Patent Pictures:
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