He developed the typical SCHLADERER square bottle that has become since its registration in 1939 at the German Patent Office for a trademark SCHLADERER and a symbol of Black Forest fruit spirits.
Yeye maendeleo ya kawaida SCHLADERER mraba chupa ambayo imekuwa tangu usajili wake mwaka 1939 katika Ofisi ya Ujerumani kwa ajili ya Patent SCHLADERER alama ya biashara na alama ya Black roho matunda ya misitu.