TREA

Ranjit Kumar Singh

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  • Singapore, SG
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rolling cutter drill bits
    • Patent number 6,354,740
    • Issue date Mar 12, 2002
    • Camco International Inc.
    • Ranjit Kumar Singh
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rolling cutter drill bits
    • Patent number 5,725,313
    • Issue date Mar 10, 1998
    • Camco International Inc.
    • Ranjit Kumar Singh
    • E21 - EARTH DRILLING MINING