申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SIMONETTI, JOHN, J.;STOLLER, CHRISTIAN;HORT, ALBERT;DURNER, EDWARD, F. |
发明人 |
SIMONETTI, JOHN, J.;STOLLER, CHRISTIAN;HORT, ALBERT;DURNER, EDWARD, F. |