Hello, among the "independent intellectual property rights" that we often talk about in China at present, "independence" is generally from the perspective of the country, which should mean that China people have developed it themselves or have rights. However, from the perspective of enterprises, it is hard to say "independence" if it is a cooperative development of multiple enterprises. Of course, if you three companies agree with each other, you can talk about it, but it should be "autonomy" for your group.
You can look at Baidu's "independent intellectual property rights" again, and Baidu Encyclopedia has an explanation.