IP Library › Assignment 020563/0640
Patent Assignment
Reel/Frame 020563/0640

Assignment of Assignor's Interest

Recorded: 2008-02-26 Pages: 3
Assignors
DAHLGREN, SCOTT, MR.
Executed: 2008-02-26
BAILEY, JOHN, MR.
Executed: 2008-02-21
Assignee
HALL, DAVID R., MR.
2185 SOUTH LARSEN PARKWAY, PROVO, UTAH, 84606
Covered Property (1)
Downhole Hammer Assembly
Patent: 7,641,003 →
Application: 12/037,733 →
Publication: US 2008/0142273
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Oct 20, 2008
From: HALL, DAVID R.
To: NOVADRILL, INC.
Reel/Frame 021701/0758 →
Assignment of Assignor's Interest Mar 10, 2010
From: NOVADRILL, INC.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 024055/0457 →