. . . . . . . . . . . . . . "Patents"@en . . . . . . . "Clay Commercial Telephone Company et al., appellants, vs. American Bell Telephone Company et al"@en . . "Trials, litigation, etc"@en . . . "Electronic books"@en . . "The Clay Commercial Telephone Co. et al., appellants, vs. American Bell Telephone Co. et al. appeal from the Circuit Court of the United States for the Eastern District of Pennsylvania : brief for appellants"@en . . .