These two companies are selling action cameras and drones that have the same look, performance, and specifications as DJI's products, but they do not acknowledge any relationship with the Chinese drone maker.

Following the FCC's decision last year to put DJI on its "Covered List' of blacklisted companies, the drone firm has just sued the agency. It argues that the import ban undermines the principles of a fair market, while denying Americans access to the latest technology.