Qualcomm Inc. has dropped the Day Casebeer Madrid & Batchelder firm from a patent infringement dispute against Nokia in San Diego.

It’s the second time mobile-phone chip giant Qualcomm has severed relations with Day Casebeer since both the company and the Cupertino, Calif., firm admitted in the spring to committing a massive discovery breach in a patent case against Broadcom Corp. A federal magistrate judge will hear testimony next month from attorneys involved in that gaffe and will decide whether to impose formal sanctions.