Patent Assignment
Reel/Frame 016540/0424
Assignment of Assignor's Interest
Recorded: 2005-05-04
Pages: 3
Assignor
O'CALLAHAN, DENNIS M.
Executed: 2005-05-04
Assignee
CHICAGO BOARD OPTIONS EXCHANGE
400 SOUTH LASALLE ST., CHICAGO, ILLINOIS, 60605
Covered Property
(1)
System and Method for Creating and Trading Packaged Collar Options on an Exchange
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.