US Patent: 150,687
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Screw Cutting Machines
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Patentees:
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Joseph L. Hall (exact or similar names) - Cincinnati, Hamilton County, OH |
Henry Millward (exact or similar names) - Cincinnati, Hamilton County, OH |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Apr. 06, 1874 |
Granted: |
May 12, 1874 |
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Joel Havens
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