 Until 1930 the industrial sector grew strongly in Allschwil (mainly brick, along with clothing, metal and machinery industry) and in 1910 about 73% of workers worked in industry.In the 1870s several brick factories opened in Allschwil, including Passavant-Iselin & Co. a company that had the first interlocking tile press in Switzerland.Passavant-Iselin & Co. remained in operation until they closed in 1975.