In fact, for many years, the use of Huawei's patents by other companies, and Huawei's use of other companies' patents, largely came from the patent cross-licensing of companies such as Huawei and Qualcomm.
Under this framework, other companies are free to use Huawei's, and Huawei can also use other companies' (maybe this is incomplete, and there may be various exceptions).
However, now that the list of entities has appeared, and the contract and legal basis for cross-licensing are gone, Huawei (in Plano's US headquarters) naturally has reason to ask other companies to collect patent fees (at the same time, it is not excluded that other companies will come to China to collect another part of the patent fees used by Huawei from the products currently sold by Huawei).
This is an extremely complicated question, so complicated that there is a high probability that no one can give a complete answer in Zhihu (these contents may involve all kinds of trade secrets and complicated legal provisions of various countries, and may involve patent reexamination and negotiation between Huawei and dozens of major suppliers). Perhaps the legal departments of Huawei and all its partners are working overtime to study the relevant laws of China and the United States and re-examine these contracts signed with Huawei.
I can only say that the Trump incident has done great harm to the technology industries of China and the United States. It is not a problem for any company to sell less products. Thoroughly smashed and smashed the entire manufacturing supply chain system and upstream and downstream relations between China and the United States, as well as the entire stable legal basis for patent cross-authorization. The great harm of this matter may not be seen until several years later.
My biggest expectation is that Trump will immediately alleviate these problems within two years, because-
No one is the winner in this war.