After moving to Berlin, Stam devised a steel-tubing cantilever chair, using lengths of standard gas pipe and standard pipe joint fittings. New research indicates that Stam was inspired by a cantilever tubular steel seat seen installed in a 1926 Tatra T12 two-door saloon car. Ludwig Mies van der Rohe became aware of Stam's work on the chair during planning for the Weissenhof Siedlung and mentioned it to Marcel Breuer at the Bauhaus. This led almost immediately to variations on the cantilevered tubular-steel chair theme by both Mies van der Rohe and Marcel Breuer, and began an entire genre of chair design. In the late 1920s, Breuer and Stam were involved in a patent lawsuit in German courts, both claiming to be the inventor of the basic cantilever chair design principle. Stam won the lawsuit, and, since that time, specific Breuer chair designs have often been erroneously attributed to Stam. In the United States, Breuer assigned the rights to his designs to Knoll, and for that reason it is possible to find the identical chair attributed to Stam in Europe and to Breuer in the U.S.