Dear Lodsys, Payback is a Bitch.

FOSS Patents blog reports that ESET, the maker of NOD-32 Antivirus filed a declaratory judgment action against Lodsys with the U.S. District Court for the Southern District of California.

Lodsys recently gained notoriety for filing lawsuits against seven iOS Developers for in-app-purchases and in-app-upgrades related patents. Apple then filed motion to intervene on Lodsys Patent Lawsuit. A Michigan company named ForeSee Results Inc. is seeking to invalidate Lodsys patent portfolio.