Ottmar Mergenthaler, Machine for Producing Linotypes Patent
Ottmar Mergenthaler, Machine for Producing Linotypes, Type Matrices, & c. (also known as “Simplex”), U.S. Letters Patent No. 436,532, dated September 16, 1890
Ottmar Mergenthaler, Machine for Producing Linotypes, Type Matrices, & c. (also known as “Simplex”), U.S. Letters Patent No. 436,532, dated September 16, 1890