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