US Patent: 1,617,443
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| Micrometer
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Patentees:
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| Ernest A. Erickson (exact or similar names) - Wilson, PA |
| Zearl E. Neal (exact or similar names) - West Elizabeth, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 30, 1925 |
| Granted: |
Feb. 15, 1927 |
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Joel Havens
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Description: |
| Green & McCallister - patent attorneys
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