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US Patent: 1,682,437
Circulating System
Patentee: Carl G. Sprado (exact or similar names) - Milwaukee, WI USPTO Classifications: 123/41.45 Tool Categories: propulsion and energy : internal combustion engines : cooling apparatus Assignees: Allis-Chalmers Co. - Milwaukee, WI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 19, 1926 Granted: Aug. 28, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Allis-Chalmers Manufacturing Co.

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