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US Patent: 731,871
Friction Indexing Mechanism
Patentee: Francis G. Echols (exact or similar names) - Hartford, Hartford County, CT USPTO Classifications: 269/63, 74/813R Tool Categories: metalworking machines : indexers and dividers Assignees: Pratt & Whitney Co. - Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 18, 1902 Granted: Jun. 23, 1903 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.

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