申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;DEN BOER, LENNERT, DAVID;SAYERS, COLIN, MICHAEL |
发明人 |
DEN BOER, LENNERT, DAVID;SAYERS, COLIN, MICHAEL |