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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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