US Patent: 3,141,267
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| Precision Grinding Machine
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Patentees:
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| Harry E. Luebkemann (exact or similar names) - Cincinnati, Hamilton County, OH |
| Jacob Decker (exact or similar names) - Cincinnati, Hamilton County, OH |
| Albert H. Dall (exact or similar names) - Cincinnati, Hamilton County, OH |
| USPTO Classifications: |
| 451/1 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 29, 1962 |
| Granted: |
Jul. 21, 1964 |
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Joel Havens
"Vintage Machinery" entry for Cincinnati Milling Machine Co.
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