Not all important development were made through the Request for Comment process. Two popular link protocols for local area networks (LANs) also prepares in the 1970s. A patent for the token ring protocol was filed by Olof Soderblom on 29 October 1974 and a paper on the Ethernet protocol was published y Robert Metcafe and David Boggs in the July 1976 issue of Communications of the ACM.