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US Patent: 102,664
Improvement in pump-valves
Patentee: Joseph W. Douglas (exact or similar names) - Middletown, CT USPTO Classifications: 137/858 Tool Categories: household : water and plumbing : household hand pumps Assignees: W. & B. Douglas - Middletown, CT Manufacturer: W. & B. Douglas - Middletown, CT Witnesses: Daniel W. Raymond George M. Smith	Patent Dates: Granted: May 03, 1870 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for W. & B. Douglas

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