A U.S. federal court jury has found Qualcomm infringed three Broadcom patents and awarded Broadcom $19.6 million in damages.

The jury in U.S. District Court in Santa Ana, California, found Qualcomm infringed the patents wilfully, and a judge could increase the award as much as three times for this, according to a Qualcomm statement. At a hearing on June 18, the judge in the case is scheduled to set dates for post-trial motions. Qualcomm, a cellular pioneer and a wireless intellectual-property powerhouse, said it would challenge the findings in post-trial motions and, if necessary, file an appeal. Broadcom plans to ask for a permanent injunction to stop Qualcomm from using the technologies.

The finding came as part of a string of patent disputes between the two companies. Broadcom is relatively new to the mobile-phone chip business but is quickly becoming a major rival to Qualcomm, according to In-Stat analyst Allen Nogee. Meanwhile, Qualcomm is rapidly branching out into new technologies itself.

"I'm not surprised Qualcomm steps on a few patents," Nogee said. Even with the threat of an injunction, the court defeat doesn't pose the kinds of dangers raised by Vonage's dispute with Verizon, he said. Qualcomm is too big to be forced out of business by one suit, and a cross-licensing deal might solve the problem.

The case, filed in May 2005, involves five Broadcom patents. Broadcom dismissed its claims on one patent, and the court stayed the case with regard to another, according to Qualcomm. On Tuesday, the jury cleared Qualcomm on one claim regarding one of the patents.

The patent claims affect key Qualcomm products: its EV-DO (Evolution-Data Optimized) high-speed mobile data chips, its QChat push-to-talk software, and chip platforms for mobile multimedia, according to a Broadcom statement.

Broadcom claimed Qualcomm used U.S. Patent 5,657,317 in technology within its EV-DO chips that lets a device participate in two networks at the same time. Qualcomm used Broadcom technology covered by patent 6,847,686 , for a chip architecture for video processing, in its Enhanced Multimedia Platform, a series of chipsets designed to handle multimedia on 3G multimode handsets, according to Broadcom.

Finally, Broadcom claimed QChat uses innovations covered by patent 6,389,010 , which relates to a phone that can make calls over networks with either fixed or variable bandwidth. Sprint Nextel is looking to QChat as an alternative to the popular push-to-talk service on its iDEN network as it shifts focus to its CDMA (Code Division Multiple Access) network, based on Qualcomm technology.

This story was updated on May 29, 2007