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US Patent: 491,543
Valve for Pumps
Patentee: Hamlin F. Frisbie (exact or similar names) - Covington, Kenton County, KY USPTO Classifications: 137/512.2, 417/558, 48/144 Tool Categories: industrial machines : pumps : pump valves Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 10, 1892 Granted: Feb. 14, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Frisbie Engine and Machine Co.

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