A contentious patent dispute between drone makers is heading toward trial to determine damages, since the federal judge handling the case entered default judgment against the defendant as a sanction after months of discovery delays.

U.S. District Judge Arthur J. Schwab of the Western District of Pennsylvania denied two motions this week from the defendant, the French drone-maker Parrot. Neither the motion for summary judgment nor the motion to dismiss convinced the judge to do anything but head toward determining damages in the case brought by Drone Technologies.

The company alleged Parrot had infringed on two of its patents.