Sun Microsystems asked a California court on Wednesday to order network-attached processing specialist Azul Systems to stop infringing Sun patents on memory technology, and to order the company to pay damages.The filings, made in the San Jose division of the U.S. District Court for the Northern District of California, counter a suit Azul filed in March, asking the court to block just such a move.In March, Azul announced that Sun had threatened to sue it for patent infringement and abuse of trade secrets, and filed suit to prevent Sun from doing so.Now Sun has made good on the alleged threat, asking for a jury trial to consider its claim for exemplary and punitive damages to deter Azul from infringing its patents.The case relates to technology for improving the performance of microprocessors through the use of "speculative locking" and transactional memory, which Azul is now using in its products. Sun claims Azul is infringing patents related to Sun\u2019s prior research in the field, and that it abused trade secrets by poaching Sun employees familiar with the technology. Sun also said the employees had signed agreements not to disclose or make use of their knowledge of Sun\u2019s intellectual property.One of the former Sun executives named in the suit is Stephen DeWitt, the former chief executive officer (CEO) of server appliance manufacturer Cobalt Networks. He joined Sun when it bought Cobalt in 2000, signing a noncompete agreement at that time, according to Sun. Later, while still bound by the agreement, DeWitt went on to become CEO of Azul.Sun said that by hiring DeWitt and nine other former Sun employees named in the court filing, Azul improperly accessed Sun technology, allowing Azul to bring products to market more quickly.-Peter Sayer, IDG News ServiceCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.