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US Patent: 820,549
Means for Cooling Engine and Other Cylinders
Patentee: Edward P. Caldwell (exact or similar names) - Chicago, IL USPTO Classifications: 123/41.3, 165/183 Tool Categories: propulsion and energy : internal combustion engines : cooling apparatus Assignees: Charles W. Caldwell - Waterloo, Black Hawk County, IA Manufacturer: Caldwell-Hollowell Mfg. Co. - Waterloo, Black Hawk County, IA Witnesses: Albert H. Adams Minnie A. Hunter G. V. Donasu J. B. Weir	Patent Dates: Applied: Dec. 22, 1904 Granted: May 15, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Caldwell-Hollowell Mfg. Co.

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