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US Patent: 136,101
Improvement in machines for forming cutters for cutting the teeth of wheels
Patentee: William Sellers (exact or similar names) - Philadelphia, PA USPTO Classifications: 82/11.1 Tool Categories: metalworking machines : gear cutting tools metalworking tools : machinist tools : gear cutting tools Assignees: None Manufacturer: Not known to have been produced Witnesses: William E. Morgan William S. Lynn	Patent Dates: Granted: Feb. 18, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for William Sellers & Co.

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