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US Patent: 6,755
Varying the Speed of Mandrels in Lathes
Patentee:
William A. Chapin (exact or similar names) - St. Johnsbury, VT

USPTO Classifications:
475/308, 82/143

Tool Categories:
metalworking machines : metal lathes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. P. Fairbanks
Hiram Knapp
Patent Dates:
Granted: Oct. 02, 1849

Patent Pictures:
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