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US Patent: 371,518
Double-acting force-pump
Patentees: Andrew Potter (exact or similar names) - Salem, OH Charles H. Betts (exact or similar names) - Salem, OH USPTO Classifications: 417/548 Tool Categories: Assignees: Silver & Deming Mfg. Co. - Salem, OH Manufacturer: Not known to have been produced Witnesses: Joseph Reitzell William R. King	Patent Dates: Applied: Nov. 13, 1886 Granted: Oct. 11, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Silver & Deming Mfg. Co.

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