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US Patent: 423,729
Device for Cutting Screw Threads
Patentees:
George A. Chapman (exact or similar names) - Guilderland, Albany County, NY
Jay H. Newbury (exact or similar names) - Guilderland, Albany County, NY

USPTO Classifications:
470/96

Tool Categories:
metalworking machines : metal threading machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 07, 1888
Granted: Mar. 18, 1890

Patent Pictures:
USPTO (New site tip)
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