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US Patent: 1,252,763
Thread Milling Machine
Patentees:
Oscar Zerk (exact or similar names) - Cleveland, OH
George W. Drake (exact or similar names) - South Euclid, Cuyahoga County, OH

USPTO Classifications:
409/68, 409/70

Tool Categories:
metalworking machines : metal threading machines

Assignees:
George W. Bowen - Auburn, NY

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 31, 1913
Granted: Jan. 08, 1918

Patent Pictures:
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