Has the wifi patent expired?

Wi-Fi technology was invented by CSIRO, a research institute under the Australian government, in the 1990s, and successfully applied for the wireless network technology patent in the United States on 1996. (U.S. Pat. No.5,487,069) The inventor is a research group composed of engineering graduates from the University of Sydney led by Dr. john O'Sullivan, a graduate of the University of Sydney.

IEEE once asked the Australian government to give up the Wi-Fi patent and let the world use Wi-Fi technology for free, but it was rejected.

The Australian government subsequently won the lawsuit or settled out of court in the United States, suing almost all electrical and telecommunications companies in the world (including Apple, Intel, Lenovo, Dell, AT & amp； T, Sony, Toshiba, Microsoft, Acer, ASUS, etc. ) 20 10/0 Every time we buy an electronic device with Wi-Fi technology, the price paid includes the patent fee paid to the Australian government. By the end of 20 13, CSIRO's wireless network patent will expire, and CSIRO has won back 430 million dollars for the Australian government and itself.

Wi-Fi was praised by the Australian media as the most important scientific and technological invention in Australian history, and its inventor JohnO'Sullivan was called "the father of Wi-Fi" by the Australian media, and won the highest national science award in Australia and numerous praises around the world, including the European Inventor Award 20 12, namely the European Inventor Award 20 12 awarded by European institutions, the European Patent Office and the European Patent Office (EPO).