申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LTD;GUERRERO, JULIO;HOVER, FRANZ;AMBLER, CHARLES;REED, BROOKS;HUMMEL, ROBERT |
发明人 |
GUERRERO, JULIO;HOVER, FRANZ;AMBLER, CHARLES;REED, BROOKS;HUMMEL, ROBERT |