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US Patent: 2,151,656
Choke Fitting for Steam Heat Pipes
Patentee: Bengt E. Folke (exact or similar names) - Mamaroneck Village, Westchester County, NY USPTO Classifications: 138/45, 251/207, 251/288 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : feedwater apparatus Assignees: Nathan Mfg. Co. - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 11, 1937 Granted: Mar. 21, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Nathan Mfg. Co.

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