Patent Assignment Abstract of Title
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Total Assignments:
1
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Patent #:
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Issue Dt:
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02/12/1991
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Application #:
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07435144
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Filing Dt:
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11/08/1989
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Inventors:
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JOHN T. BRANDELL, DAVID D. SZARKA, BOB L. SULLAWAY
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Title:
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CASING VALVE
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST.
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| DUNCAN, STEPHENS,, OKLAHOMA |
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| JAMES R. DUZAN |
| HALLIBURTON SERVICES |
| P. O. BOX DRAWER 1431 |
| DUNCAN, OK 73536-0102 |
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