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US Patent: 491,940
Balance Slide Valve
Patentee: Charles O. Heggem (exact or similar names) - Massillon, Stark County, OH USPTO Classifications: 91/466 Tool Categories: propulsion and energy : steam apparatus : steam traction engines : traction engine valve gear Assignees: Russell & Co. - Massillon, Stark County, OH Manufacturer: Not known to have been produced Witnesses: W. K. Miller Charles R. Miller E. G. Lane	Patent Dates: Applied: Oct. 03, 1892 Granted: Feb. 14, 1893 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for C. M. Russell & Co.

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