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US Patent: 257,871
Pump
Patentee:
John Humphreys, Jr. (exact or similar names) - Salem, OH

USPTO Classifications:
137/596, 137/625.22, 137/625.47, 417/543

Tool Categories:
industrial machines : pumps : rotary pumps

Assignees:
Silver & Deming Mfg. Co. - Salem, OH

Manufacturer:
Not known to have been produced

Witnesses:
T. C. Read
W. Burr Henion

Patent Dates:
Applied: Nov. 01, 1881
Granted: May 16, 1882

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Silver & Deming Mfg. Co.

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