Show Oklahoman Sues Sun Oil Company Los Angeles A suit brought by Erie p P. P Halliburton of Duncan Okla against the Federal Drilling company company com pany of Los Angeles alleging alleging- infringement in infringement ement of patents owned by Hal and involving methods anc and apparatus u used ed In cementing oil wells wella has been filed flied in federal court rt here The action is expected to clear up several leveral disputed points point concerning rights o In involved ved in the cementing pro pro- clue ceases in general use in oil fields throughout the country r |