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GB Patent: GB-191,323,907
Improvements in Internal Grinding Machines
Patentees: Sydney Herbert March (exact or similar names) - Chorlton-cum-Hardy, Lancashire County, England Harry Hales Asbridge (exact or similar names) - Pendlebury, Lancashire County, England USPTO Classifications: Tool Categories: metalworking machines : grinders : internal grinders Assignees: Churchill Machine Tool Co., Ltd. - Altrincham, Cheshire County, England Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 22, 1913 Granted: Dec. 04, 1913 Patent Pictures: Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Churchill Machine Tool Co., Ltd.

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