CBOE Looks To Thwart Rival's Infringement Claims

Law360 (February 2, 2007, 12:00 AM EST) -- The Chicago Board Options Exchange Inc. (CBOE) has filed a declaratory judgment suit, asking a federal judge in Chicago to declare three automated exchange-related patents held by rival International Securities Exchange Inc. invalid and/or not infringed by the CBOE’s hybrid trading system.

The declaratory judgment action against International Securities Exchange Inc. (ISE), which bills itself as the world’s largest equity options exchange, follows a November 2006 patent infringement suit ISE filed in New York. ISE’s suit alleged that the CBOE’s trading system encroached on U.S. Patent...
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