申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;FITZGERALD, JOHN, B.;STEPHENSON, KENNETH, E. |
发明人 |
FITZGERALD, JOHN, B.;STEPHENSON, KENNETH, E. |