IP Library › Granted Patent US 620,510
Granted Patent S1
US 620,510 · App. 29/304,177 · Granted Jul 27, 2010

Drill bit

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Quick Facts
Patent No.
US 620,510
App. No.
29/304,177
Granted
Jul 27, 2010
Kind
S1
Claims (1)

The ornamental design for a drill bit, as shown and described.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2010
From: HALL, DAVID R., MR.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 023973/0849 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 20, 2008
From: HALL, DAVID R.
To: NOVADRILL, INC.
Reel/Frame 021701/0758 →