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US Patent: 731,870
Indexing Mechanism
Patentee: Francis G. Echols (exact or similar names) - Hartford, CT USPTO Classifications: 409/221, 451/393, 74/817, 82/18 Tool Categories: Assignees: Pratt & Whitney Co. - Hartford, CT Manufacturer: Not known to have been produced Witnesses: E. D. Clark W. N. Larkum F. G. Campbell Frances E. Blogett	Patent Dates: Applied: Aug. 25, 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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