US Patent: 2,960,132
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Drilling tool
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Patentee:
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Hans-Joachim Finkeldei (exact or similar names) - Wuppertal-Barmen, Germany |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Aug. 18, 1959 |
Granted: |
Nov. 15, 1960 |
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George Langford
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Description: |
A German inventors take on the typical Archimedean drill. |
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