They really don't have to win any law suits. They can just push them out of the market.
(U) What is "Dumping"? (U) The illegal practice of exporting a product at a price lower than the cost to manufacture the product or lower than the price the manufacturer would charge in its own home market.
(U) Dumping Techniques (U) In 2015, DJI aggressively dropped its prices by as much as 70 percent in less than one year, effectively forcing its main competitors out of the market. Since that time, DJI's biggest competitors, Parrot in France, 3D RoboticsUSPER in the U.S., and Yuneec in China, all stopped production due to their inability to match DJI's prices.19 Using dumping techniques, DJI was able to sell category one UAS in the United States for approximately $900 USD. Comparatively, other group one category UAS with the same level of technology sold for $3,500 USD.20 — (U) Since DJI creates, manufactures, and tests its UAS in its own facilities in Shenzhen, it is able to keep costs much lower than its foreign competitors, who have higher operating costs and often have to travel across the world to build their products.21 — (U) Lower manufacturing costs, combined with illegal dumping tactics, have effectively given DJI a monopoly in the category one UAS market in the United States. As a result, U.S. companies have fewer options and are more likely to purchase DJI UAS. — (U//LES) From August 2016 to August 2017, DJI imported 10,321 shipments into the United States, 1,741 of which entered through the Ports of Los Angeles and Long Beach. Comparatively, from August 2015 to August 2016, DJI imported 2,873 shipments into the United States.22 In a one year period, DJI was able to drastically increase shipments of UAS to the United States market, likely due to its low prices and lack of competition.