Credit For Printing Press

According to Wkipedia.com

"Johannes Gutenberg is credited with inventing the first printing press, although there are several local claims for the invention of the printing press in other parts of Europe, including Laurens Janszoon Coster in the Netherlands and Panfilo Castaldi in Italy."

Gutenberg was given credit because he was the first to convert the concept for printing use. Other were only using the screw prss to bind books and manuscripts he applied the process to printing. The others were making Gutenberg used this and a few of his other inventions to single handedly make greater printing output than with manual work. He did this and revolutionized the way we make handout and many documents including contracts today.

http://en.wikipedia.org/wiki/Printing_press