Slavoljub Eduard Penkala
Engineer
Engineer and inventor who became their for further developing the mechanical pencil and created the first solid-ink fountain pen.
He graduated from the Dresden University of Technology in 1898.
He had 80 patents, and was responsible for constructing the first Croatian two-seat airplane.
He moved with his wife and children to Zagreb after earning his Ph.D. in Organic Chemistry.
He was an inventor similar to Hiram Maxim.