US Patent: 3,101,649
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| Spiral Milling Machine
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Patentees:
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| Robert W. Nashold (exact or similar names) - New Richmond, Clermont County, OH |
| Herman J. Baldwin (exact or similar names) - Cincinnati, Hamilton County, OH |
| Vincent L. Mitchell (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: |
Dec. 19, 1958 |
| Granted: |
Aug. 27, 1963 |
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Joel Havens
"Vintage Machinery" entry for Cincinnati Milling Machine Co.
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