Class 176 - Boring or Penetrating the Earth, Patent Classification Definitions, Dec. 1999
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Export as CSV| Title | Class 176 - Boring or Penetrating the Earth, Patent Classification Definitions, Dec. 1999 |
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C 21.3/2:176/999
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| Date Created | September 29, 2001 |
| Last Modified | September 29, 2001 |
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