Assignee Name

Record Count

% of 366 Patents

Halliburton Energy Services Inc

Texas United Chemical Co LLC

M-I LLC

Baker Hughes Inc.

China Petroleum & Chemical Corp

Hercules Inc.

Schlumberger Holdings Ltd.

Schlumberger Technology BV

Services Petroliers Schlumberger

Schlumberger Canada Ltd.

55

12

11

10

10

10

10

10

10

9

15.027

3.279

3.005

2.732

2.732

2.732

2.732

2.732

2.732

2.459