US Patent: 1,394,628
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| Lathe Tool Holder
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Patentees:
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| Le Roy Kramer (exact or similar names) - Chicago, Cook County, IL |
| Alexander Boome (exact or similar names) - Chicago, Cook County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 28, 1918 |
| Granted: |
Oct. 25, 1921 |
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Joel Havens
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