Ottmar Mergenthaler, Machine for Producing Printing Bars Patent
Ottmar Mergenthaler, Machine for Producing Printing Bars (also known as his “Single-Matrix” machine; later known as the “Blower”), U.S. Letters Patent No. 317,828, dated May 12, 1885.
Ottmar Mergenthaler, Machine for Producing Printing Bars (also known as his “Single-Matrix” machine; later known as the “Blower”), U.S. Letters Patent No. 317,828, dated May 12, 1885.