Title: George A. Campbell, application filed March 5, 1900, serial no. 7281 v. Michael I. Pupin, patent issued June 19, 1900, no. 652, 230, application filed Dec. 14, 1899, serial no. 740, 238
Subjects: Trials, litigation, Patent laws and legislation
Places: United States
People: Michael Pupin (1858-1935), George A. Campbell (1870-1954)