Garmin has filed suit against uAvionix—which makes Automatic Dependent Surveillance-Broadcast (ADS-B) and other avionics, including an easily installed wingtip-mounted solution that it says is nearing FAA Technical Standard Order approval—alleging patent infringement. uAvionix disputes the allegation and said in a statement that the suit will not affect its certification or delivery of ADS-B hardware.
Source: aopauAvionix sued for patent infringement