Zoe Bollinger
Mar 4, 2015

PTAB cancels Chicago options exchange patents at stake in $525 million patent infringement lawsuit

The fate of a $525 million patent infringement lawsuit by the Chicago Board Options Exchange against a rival exchange is up in the air after a U.S. Patent and Trademark Office tribunal on Monday invalidated all three of its patents.

PTAB cancels Chicago options exchange patents | Reuters
(Reuters) - The fate of a $525 million patent infringementlawsuit by the Chicago Board Options Exchange against a rivalexchange is up in the air after a U.S. Patent and TrademarkOffice tribunal on Monday