South Pasadena-based Cogent Systems, a provider of biometric systems and fingerprint readers, said Thursday that it has settled a patent suit against UPEK Inc., a competing biometrics firm. Cogent said that it has reached a licensing agreement with UPEK for the use of its technology;, but did not disclose financial terms. Cogent had sued UPEK for patent infringement in May over U.S. Patent 6,002,815.