Ferdinand Kovačević
From Wikipedia, the free encyclopedia
Ferdinand Kovačević (21 April 1838– 27 May 1913) was an inventor, engineer, and pioneer in telegraphy who originated from Gospić (actually near Smiljan)[1][2] in modern-day Croatia. He invented the duplex connection of telegraphic transmission,[3] patented in 1876 in Vienna and Budapest.[4]

He died in Zagreb on 27 May 1913.[5]
His son was the painter, Ferdo Kovačević.