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US Patent: 6,305
Machine for regulating the twist and diameter of screw-augers
Patentees:
Lucius B. Smith (exact or similar names) - Meriden, CT
Nathaniel C. Sanford (exact or similar names) - Meriden, CT

USPTO Classifications:
72/371, 72/469, 72/88, 76/108.6

Tool Categories:
woodworking machines : specialty woodworking machines : tool making machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Benajah Andrews
Catharine J. Helsey

Patent Dates:
Granted: Apr. 10, 1849

Patent Pictures:
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