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2005-02-01 |
| 6477227 |
Methods for identification and verification |
Bruce Kaiser, Lloyd Starks, David Watson, Don Kenning, Dan Schoepflin |
2002-11-05 |
| D460370 |
Portable analyzation device |
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| 6350309 |
Methods and compositions for cementing pipe strings in well bores |
Jiten Chatterji, Roger S. Cromwell, Bobby J. King |
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| 6244344 |
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Inverse differential casing cementing float valve |
— |
1986-10-07 |