US Patent: 423,729 - Device for Cutting Screw Threads


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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:

Tool Categories:

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Pictures: