申请人 |
SERVICE PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;HARTOG, ARTHUR;FORBES, KEVIN;STRONG, ANDY;HAMPSON, ROGER |
发明人 |
HARTOG, ARTHUR;FORBES, KEVIN;STRONG, ANDY;HAMPSON, ROGER |