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US Patent: 143,242
Gear Cutting Attachments to Lathes
Patentee: William P. Hopkins (exact or similar names) - Lawrence, MA USPTO Classifications: 74/813R Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments Assignees: None Manufacturer: Not known to have been produced Witnesses: Baldwin Coolidge George G. Adams John J. Colby	Patent Dates: Applied: Apr. 24, 1873 Granted: Sep. 30, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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