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US Patent: 1,812,444
Grinding Machine
Patentees: Maxwell Ingraham Mathewson (exact or similar names) - Providence, Providence County, RI Arthur Brown (exact or similar names) - Cranston, Providence County, RI USPTO Classifications: 384/286, 451/340 Tool Categories: metalworking machines : grinders : surface grinders Assignees: Brown & Sharpe Mfg. Co. - Providence, Providence County, RI Manufacturer: Brown & Sharpe Mfg. Co. - Providence, Providence County, RI Witnesses: Unknown	Patent Dates: Applied: Jun. 22, 1927 Granted: Jun. 30, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens Vintage Machinery entry for Brown & Sharpe Mfg. Co.
Description: This patent number has been seen on a Brown & Sharpe No. 5 surface grinder.

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