Inventor

DU CASTEL BERTRAND

US10 patents

⚠️ This page may combine multiple inventors who share the name “DU CASTEL BERTRAND”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SCHLUMBERGER TECHNOLOGY CORP

3 patents

US9416646B2Aug 16, 2016

Determining drill string status in a wellbore

SCHLUMBERGER TECHNOLOGY CORP2 citations58

US10859723B2Dec 8, 2020

Systems and methods for using Stoneley waves for bottom-hole proximity detection

SCHLUMBERGER TECHNOLOGY CORP0 citations45

US10648296B2May 12, 2020

Borehole casing deployment detection

SCHLUMBERGER TECHNOLOGY CORP0 citations36

SCHLUMBERGER MALCO INC

1 patent

US6157966ADec 5, 2000

System and method for an ISO7816 complaint smart card to become master over a terminal

SCHLUMBERGER MALCO INC132 citations98

LEYDIER ROBERT A

1 patent

US8266451B2Sep 11, 2012

Voice activated smart card

LEYDIER ROBERT A239 citations96

SCHLUMBERGER IND SA

1 patent

US6591229B1Jul 8, 2003

Metrology device with programmable smart card

SCHLUMBERGER IND SA56 citations93

GEMALTO SA

1 patent

US7926096B2Apr 12, 2011

Enforcing time-based transaction policies on devices lacking independent clocks

GEMALTO SA17 citations82

DU CASTEL BERTRAND

1 patent

US8606734B2Dec 10, 2013

System and method for automating exploration or production of subterranean resource

DU CASTEL BERTRAND9 citations77

GERARDI PAUL D

1 patent

US9235838B2Jan 12, 2016

System and method for secure downhole intelligent completions

GERARDI PAUL D8 citations74

AXALTO INC

1 patent

US7127529B2Oct 24, 2006

Smart card system having asynchronous communication with the smart card operating either as master or slave

AXALTO INC7 citations72