Patent Assignment
Reel/Frame 017418/0739
Assignment of Assignor's Interest
Recorded: 2006-03-31
Pages: 5
Assignors
FERGUSON, RALPH BRUCE
Executed: 2006-03-24
CHEUNG, LIAM
Executed: 2006-03-23
BOYD, RONALD SCOTT
Executed: 2006-03-24
Assignee
PENSON WORLDWIDE, INC.
1700 PACIFIC AVENUE, SUITE 1400, DALLAS, TEXAS, 75201
Covered Property
(1)
Modeling Financial Instruments Using Bid and Ask Prices