The many significant inventions and revolutions of earlier centuries ensured that the printing industry in Europe began the 20th Century as a dominant and growing industry. But the revolution was not over yet. The first lithographic offset press for printing on paper was created in 1903 by American paper manufacturer Ira Washington Rubel and, in 1923, Koenig & Bauer launched their four-color Iris printing press, used for banknote printing. Many other machine producers who came into being during this time still exist today: such as Manroland, who were founded in 1911. During the first half of the 20th Century, printed products, such as greetings cards, paperback books and magazines, became more and more commercially popular, sustaining a booming industry.