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US Patent: 2,160,405
Work holder
Patentee: Frank Rhodeback Mallalieu (exact or similar names) - Oxford, PA USPTO Classifications: 219/158, 335/295 Tool Categories: metalworking machines : grinders : magnetic chucks metalworking machines : milling machines : milling machine accessories work holding : magnetic chucks Assignees: None Manufacturer: Brown & Sharpe Mfg. Co. - Providence, RI Witnesses: Unknown	Patent Dates: Applied: Apr. 08, 1938 Granted: May 30, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Brown & Sharpe Mfg. Co.
Description: A Brown & Sharpe magnetic chuck—a rotary No. 5R—was seen with this patent number, and patent 2,053,177, on it.

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