Switzerland had survived WWII as a neutral country (along with Sweden) and a group of Swiss designers, who had been developing fresh, new, concepts of design from the 1930's on, now came onto the center stage of International graphic design.
After the war, the Swiss Haas type foundry commisioned Max Miedinger to refine and upgraph their older Akzidenz Grotesk fonts and they marketed the revision as Neue Haas Grotesk ( San-serif type faces go by the name Grotesk in Europe). Around 1958 the German D. Stempel AG typefoundry bought it up and introduced it as Helvetica and the rest is history. I have read that Miedinger died a bitter man as he only received a flat fee for the original redesign.
Cover Haas'che Schriftgiessersi AG typeface pattern book designed by Müller-Brockmann 1962.