Re: Not mains but wiring just the same
Oh, but they did pay royalties to...Olaf Soderblom, who claimed he had a patent on some fundamental principle behind Token Ring.
It was quite the court battle, back in the day.
Meanwhile, Ethernet, once it got past shared media, just worked. DEC, Intel and Xerox saw the wisdom of working things out among themselves so that Ethernet became cheap and plentiful.