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US Patent: 406,857
Screw Cutting Die
Patentee:
Alexander Saunders - Yonkers, Westchester County, NY

USPTO Classifications:
279/115, 408/176, 470/75

Tool Categories:
metalworking machines : pipe threading machines

Assignees:
D. Saunders' Sons - Yonkers, Westchester County, NY

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Apr. 11, 1889
Granted: Jul. 09, 1889

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for D. Saunders' Sons

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