US Patent: 1,259,045
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| Drill Sharpener
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Patentees:
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| Theodore H. Proske (exact or similar names) - Denver, CO |
| Alexander L. Proske (exact or similar names) - Denver, CO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 23, 1916 |
| Granted: |
Mar. 12, 1918 |
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Joel Havens
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Description: |
| A. J. Bond - patent attorney
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