The developers gained an ally in beating back those infringement claims on Tuesday, when web analytics company Foresee Results Inc. and its lawyers at McDermott, Will & Emery sued Lodsys in Chicago federal district court for declaratory judgment that Lodsys’s patents are invalid and not infringed by Foresee’s products.

Foresee counsel Michael Shanahan of McDermott told us Wednesday that Foresee hadn’t been threatened directly by Lodsys. But Lodsys had sent letters to Foresee’s clients accusing them of infringement, he said. Attached to the Tuesday’s complaint are nearly identical letters from Lodsys CEO Mark Small to Foresee clients Adidas AG, Best Buy Co., Inc., and WE Energies seeking licensing agreements premised on the companies’ alleged infringement. “Foresee believes these allegations are without merit,” Shannon said.