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US Patent: 2,941,474
Self-Priming Pumping Apparatus
Patentee: Malcolm S. Hall (exact or similar names) - St. Louis, MO USPTO Classifications: 417/83 Tool Categories: industrial machines : pumps : centrifugal pumps Assignees: Fairbanks, Morse & Co. - Chicago, Cook County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 20, 1956 Granted: Jun. 21, 1960 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Fairbanks Morse & Co.

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