US Patent: 703,578
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| Gear Tumbler
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Patentees:
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| Bengt M. W. Hanson (exact or similar names) - Hartford, Hartford County, CT |
| Frederick W. Gordon (exact or similar names) - Hartford, Hartford County, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 24, 1902 |
| Granted: |
Jul. 01, 1902 |
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Joel Havens
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