firm, Rudolf and Adi allowed the employees to determine which resulting firm they would work for. Because Rudolf had mainly concerned himself with sales and administration, most of the sales staff opted to join Rudolf at the Würtzburger Strasse factory. The rest, including almost all the technicians and those involved in product development and production, remained with Adi. Adi thus ended up with nearly two-thirds of the employees. To partially fill the void left by the departure of the administrative personnel Käthe and her sister Marianne Martz joined the firm and acted in a variety of capacities. Meanwhile, Adi was concerned in designing a distinctive look for his shoes, at least partially so that it would be possible to show which athletes used his footwear. He fell upon the idea of coloring the straps used for reinforcement on the sides of the shoes a different color than the shoes themselves. He experimented with different numbers of straps and ultimately decided on three. The "three stripes" became a distinctive mark of Adidas shoes. In March 1949 Dassler registered the three stripe logo as the company's trademark. As for the company's name, the plan was to use a contraction of Adi's nickname and last name (much as Rudolf originally contemplated by naming his firm "Ruda" before deciding on "Puma"), but "Addas" was rejected on the ground that it was used by a children's shoe manufacturer. Accordingly, in his 18 August 1949 company registration, Adi added a handwritten "i" between Ad- and -das to maintain the contraction (Adi Dassler). As a result, the company became known as Adolf Dassler adidas Schuhfabrik. Adidas' breakthrough, 1948–1978 Like the Dasslers, Sepp Herberger joined the Nazi Party in 1933. In 1936 after Germany's humiliating quarter final defeat by Norway at the Berlin Games, the Nazi sports authorities appointed him to coach the national football team. Herberger began an association with the Dassler firm having been cultivated by Rudolf Dassler. After the breakup Herberger sided with the Puma firm, until Rudolf once again felt his authority challenged and insulted him. Herberger switched his allegiance to Adidas. The nature of the dispute is unknown; some thought it involved the payments owed if the German team wore Puma shoes. In many respects the fit was better with Adi, who was quiet, willing to learn the needs of football players and more innovative than his brother. Herberger's drive to make Germany