GB Patent: GB-191,501,172
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| Improvements in Internal Grinding Machines and Like Machines.
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Patentees:
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| Sydney Herbert March (exact or similar names) - Chorlton-cum-Hardy, Lancashire County, England |
| Harry Hales Asbridge (exact or similar names) - Pendlebury, Lancashire County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 25, 1915 |
| Granted: |
Jul. 08, 1915 |
Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Churchill Machine Tool Co., Ltd.
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