Sysmex accuses 13 Beckman Coulter instruments of infringing 11 claims in the patent, which covers a system analyzer and a computer program.

The proposed $540 million acquisition gives Sydney-based Sonic Healthcare greater scale and a larger geographic presence in the US laboratory market.

The firm is seeking damages and various injunctions, citing 11 different counts of fraud, breach of contract, tortious interference, and unfair competition.

The lab analytics service provides insurers with guidance aimed at helping them achieve improvements in quality performance metrics.