Ottmar Mergenthaler, Machine for Producing Type Bars Patent
Ottmar Mergenthaler, Machine for Producing Type Bars (also known as “Square Base” model Linotype), U.S. Letters Patent No. 378,798, dated February 28, 1888.
Ottmar Mergenthaler, Machine for Producing Type Bars (also known as “Square Base” model Linotype), U.S. Letters Patent No. 378,798, dated February 28, 1888.