The third antitrust complaint against IBM's mainframe business was filed with the European Commission Tuesday, compounding the firm's regulatory problems in Europe.

Dell has filed a lawsuit against five LCD makers that charges them with colluding to fix prices for products, a Dell spokesman said Monday.

Apple is already reaping the benefits of its patent infringement lawsuit against HTC, according to one analyst.

Smartphone maker High Tech Computer (HTC) on Wednesday defended itself against accusations of patent infringement by Apple, saying it develops its own technology.

A home electronics retail store has filed a class-action lawsuit against Sony Corp., Samsung Electronics Co. Ltd., Toshiba Corp., LG Electronics Inc., Hitachi Ltd. and several subsidiaries, accusing the electronics manufacturers of colluding to fix prices in the U.S. optical disc drive (ODD) market.

Xerox has filed a lawsuit against Yahoo, Google and YouTube alleging infringement of Xerox patents on search and integration technology.

Oracle has won a battle regarding the way damages can be calculated in its intellectual property lawsuit against SAP, according to a ruling filed Jan. 28 in US District Court for the Northern District of California.

A federal judge has killed class-action allegations in a lawsuit that accused Microsoft of misleading consumers when it fed them anti-piracy software under the auspices of a critical security update, according to court documents.