US Patent: 1,315,318
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| Micrometer Gage
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Patentees:
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| Walter Maddison, deceased (Estate of) (exact or similar names) - London, Middlesex County, England |
| Sarah E. Maddison, Administratrix (exact or similar names) - London, Middlesex County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 19, 1919 |
| Granted: |
Sep. 09, 1919 |
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Joel Havens
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