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US Patent: 490,638
Duplex Gear Cutter
Patentee: Roger M. Clough (exact or similar names) - Tolland, Tolland County, CT USPTO Classifications: 407/113, 407/20 Tool Categories: metalworking machines : gear cutting tools Assignees: None Manufacturer: R. M. Clough - Tolland, Tolland County, CT Witnesses: Charles L. Burdett A. B. Jenkins	Patent Dates: Applied: Feb. 27, 1892 Granted: Jan. 31, 1893 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for R. M. Clough

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