IP Library › Assignment 019674/0300
Patent Assignment
Reel/Frame 019674/0300

Assignment of Assignor's Interest

Recorded: 2007-08-09 Pages: 3
Assignors
MCELHINNEY, GRAHAM A
Executed: 2007-05-02
ILLFELDER, HERBERT M.J.
Executed: 2007-04-20
Assignee
PATHFINDER ENERGY SERVICES, INC.
15151 SOMMERMEYER, HOUSTON, TEXAS, 77041
Covered Property (1)
Distance Determination from a Magnetically Patterned Target Well
Patent: 7,617,049 →
Application: 11/799,906 →
Publication: US 2008/0177475
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Feb 10, 2009
From: PATHFINDER ENERGY SERVICES, INC.
To: SMITH INTERNATIONAL, INC.
Reel/Frame 022231/0733 →
Assignment of Assignor's Interest Oct 17, 2012
From: SMITH INTERNATIONAL, INC.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 029143/0015 →