US Patent: 707,584
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| Drill Shaper
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Patentees:
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| Dan Greenwalt (exact or similar names) - Breckenridge, Summit County, CO |
| James P. Dawson (exact or similar names) - Breckenridge, Summit County, CO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 11, 1901 |
| Granted: |
Aug. 26, 1902 |
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Joel Havens
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