Wal-Mart, CVS, Others Sued Over Greeting Card Patent
Acacia Research Corp.'s Express Card Systems LLC subsidiary lodged a complaint against the retailers and photo-printing companies Friday in the U.S. District Court for the Eastern District of Texas. The defendants also include CVS Caremark Corp. and CardsDirect LLC.
Express Card accuses the defendants of directly infringing U.S. Patent Number 5,751,590, titled "System for printing social expression cards," for...
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