WIFI was not invented by one person, but by an Australian organization called Commonwealth Scientific and Industrial Research Organization. This organization is the largest scientific research institution in Australia. They invented this wireless network technology in the 1990s and applied for a patent. Because this organization is owned by Australia, the patent belongs to the Australian government.
However, after they applied for the patent, the International Institute of Electronics Engineers discussed with them and wanted them to give up the patent so that people all over the world could use WIFI technology for free, but they refused. There's nothing wrong with that. People put a lot of energy into this research. There is no reason not to let others make money.
So until now, the patent of WIFI is still in the hands of the Australian government. With the increasing popularity of WIFI technology, more and more devices use WIFI. Later, the Australian government sued many big companies. Almost all mobile phone and computer companies you can think of have filed lawsuits against them, including Apple, Microsoft, Sony, Dell and so on.
Refer to the above? Baidu encyclopedia -WiFi