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US Patent: 312,700
Machine for Making Tapered Threaded Sockets
Patentee:
Mildred Blakey (exact or similar names) - Allegheny City, Allegheny County, PA

USPTO Classifications:
470/188, 470/96, 82/15

Tool Categories:
metalworking machines : metal threading machines : pipe threading machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 11, 1884
Granted: Feb. 24, 1885

Patent Pictures:
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