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US Patent: 2,538,289
Diaphragm chuck
Patentee: Merton H. Arms (exact or similar names) - Springfield, VT USPTO Classifications: 279/127, 279/130, 279/139, 279/2.05 Tool Categories: metalworking machines : grinders metalworking machines : gear making machines Assignees: Bryant Chucking Grinder Co. - Springfield, VT Manufacturer: Bryant Chucking Grinder Co. - Springfield, VT Witnesses: Unknown	Patent Dates: Applied: Mar. 17, 1947 Granted: Jan. 16, 1951 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Bryant Chucking Grinder Co.

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