The premise of patent dispute is to have a patent first. The premise of the dispute is that inventors or invention institutions must apply for patents in various countries. It is impossible for a country to register patents in another country for special weapons like fighter planes, because the details of fighter technology need to be announced when applying for patents, which will also lead to the leakage of fighter technology to a certain extent, so inventors and manufacturers of fighter planes will apply for patents in other countries, which will lead to technology leakage.
In addition, even if the inventor of the fighter applied for a patent in another country, I don't think it will be approved, because once it is approved, it will prove that it is impossible to imitate the fighter in the future. If patents involve a lot and a wide range, then related technologies can't be touched. I don't think any country will be stupid enough to close the door to learning advanced technology. Failure to pass the audit means that foreign fighters are not recognized in China and can copy and learn technology at will.
There is no patent dispute because there is no patent for fighter in other countries. Many countries copied the advanced fighters of other countries when they introduced them. For example, Iran, where the situation is very tense now, announced a domestic fighter some time ago, but its appearance shows that it is an American F5 fighter and the prototype is an American fighter. Now it's copied over and turned against the United States. If the United States has a patent, it can also sanction Iran through a patent.
Fighters belong to a country's exclusive weapons and equipment, belong to state secrets and are controlled by the state. If you don't export it, it won't be accessible to other countries at all, so you don't need to apply for patent protection.
What I learned from military technology is that many of my own military technologies are not patented. In many countries in the world, many military weapons are copied from each other, and some of them are copied. By analyzing the shape, we can know the performance of a fighter. For example, the shape of stealth fighter, a good shape is conducive to radar stealth, because it can refract radar waves to other directions and reduce the reflection in the original direction. For example, at this year's Paris Air Show, the TF-X model of the fifth-generation aircraft announced by Turkey looks very much like the American F22 fighter.
In fact, not only fighters, radar, missiles and other advanced weapons and equipment, everyone is learning from each other. To put it bluntly, it is plagiarism. As long as you get the real thing, you can learn to imitate it or apply it to your future weapons, so it's your own. The United States and Russia, the two most powerful countries in the world, often do this, trying their best to make each other's advanced weapons ready for research.
Learning weapons and equipment can sometimes avoid detours. Since other people's advanced weapons can actually be put into use, it means that their performance is verified and available, that is, others have paved the way and just follow it, saving time and money. Why not? After learning and absorbing completely, plus your own innovative elements, you can play freely and create more advanced weapons and equipment.