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US Patent: 52,431
Improvement in pumps
Patentees: Calvin B. Gill (exact or similar names) - Rochester, NY Sylvester G. Mason (exact or similar names) - Rochester, NY USPTO Classifications: 417/524, 417/532 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: J. A. Davis R. F. Osgood	Patent Dates: Granted: Feb. 06, 1866 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Mason & Pierce
Description: Of interest because Sylvester Mason was a partner in machinery maker Mason & Pierce.

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