Medical device maker Nomir Medical Technologies Inc. is suing McDermott Will & Emery and three of its former lawyers in Massachusetts state court for $143 million for missing four key patent filing deadlines.

The medical laser maker filed its case, Nomir Medical Technologies Inc. v. McDermott, Will & Emery, in Suffolk County Superior Court in Massachusetts on July 1. The case was transferred to the Massachusetts Superior Court’s business litigation session on July 13.