Federal lawsuits from Interactive Games accuse FanDuel and DraftKings of patent infringement

Two major names in online sports betting are now facing twin federal lawsuits filed on the same day, as a smaller tech firm accuses them of using its patented systems without authorization.

Interactive Games LLC brought separate cases against FanDuel and Betfair in New Jersey and DraftKings in Massachusetts. In both filings, the company claims the operators are relying on mobile wagering technology that traces back to patents it now controls.

The lawsuits state that Interactive Games’ predecessor...