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US Patent: 412,558
Surface for grinding and crushing
Patentee: Anson P. Stephens (exact or similar names) - New Brunswick, NJ USPTO Classifications: 241/294, 241/299, 241/300 Tool Categories: stoneworking : stone crushers Assignees: None Manufacturer: Not known to have been produced Witnesses: George T. Pinckney William G. Mott	Patent Dates: Applied: Feb. 18, 1887 Granted: Oct. 08, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Stephens Patent Vise Co.

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