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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09/28/1999
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Application #:
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08850677
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Filing Dt:
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05/02/1997
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Inventors:
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XIANCHANG XIA, FUYAN ZHANG, SHAOXIA HAN, XIJUN TIAN, HONG LI
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Title:
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DOWNHOLE CUT-OFF VALVE USED FOR CEMENTING
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Assignment:
1
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ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
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| PANJIN CITY, LIAONING PROVINCE, CHINA 12401 |
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| ROTHWELL, FIGG, ERNST & KURZ, P.C. |
| JOSEPH A. HYNDS |
| 555 13TH STREET NW, SUITE 701 EAST |
| WASHINGTON, DC 20004 |
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