申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;VERMA, SANDEEP;OAKES, CHARLES S.;RAMAKRISHNAN, TERIZHANDUR S. |
发明人 |
VERMA, SANDEEP;OAKES, CHARLES S.;RAMAKRISHNAN, TERIZHANDUR S. |