IP Library Assignment 020719/0695
Patent Assignment
Reel/Frame 020719/0695

Assignment of Assignor's Interest

Recorded: 2008-03-28 Pages: 2
Assignor
TANG, CAIMU
Executed: 2008-01-24
Assignee
PATHFINDER ENERGY SERVICES, INC.
15151 SOMMERMEYER, HOUSTON, TEXAS, 77041
Covered Property (1)
Data Compression Method for Use in Downhole Applications
Patent: 8,024,121 →
Application: 12/011,422 →
Publication: US 2009/0192711
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 →