US Patent: 3,094,016
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| Trepanning and Boring Head
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Patentees:
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| Werner K. M. Kleine (exact or similar names) - Bremen-Mahndorf, Lower Saxony, Germany |
| Am Roggenber (exact or similar names) - Bremen-Mahndorf, Lower Saxony, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 20, 1959 |
| Granted: |
Jun. 18, 1963 |
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Joel Havens
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