Patent Assignment Abstract of Title
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Total Assignments:
2
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Patent #:
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Issue Dt:
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03/14/1995
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Application #:
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07299267
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Filing Dt:
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01/23/1989
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Inventors:
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DAVID R. HALL, DAVID S. PIXTON, YU XIANG-GUANG
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Title:
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DOWN-HOLE MUD ACTUATED HAMMER
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| WILLIAN BRINKS OLDS HOFER GILSON ET AL. |
| ONE IBM PLAZA |
| STE. 4100 |
| CHICAGO, IL 60611-3668 |
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Assignment:
2
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| 5599 SAN FELIPE |
| SUITE 1600 |
| HOUSTON, TEXAS 77056 |
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| JAMES W. REPASS |
| 1301 MCKINNEY STREET |
| FULBRIGHT & JAWORSKI L.L.P. |
| HOUSTON, TX 77010 |
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