[1]CurrentPatentAssignee:I.G.FARBENINDUSTRIEAG(historic)-DE479354,1929,C
[1]CurrentPatentAssignee:I.G.Farbenind-CH1371377,1928
[2]CurrentPatentAssignee:WINTHROPCHEM-US1962277,1930,A
[1]CurrentPatentAssignee:I.G.FARBENINDUSTRIEAG(historic)-DE488890,1930,C[Fortschr.Teerfarbenfabr.Verw.Industriezweige,vol.16,p.2703][Fortschr.Teerfarbenfabr.Verw.Industriezweige,vol.16,p.2703]
[1]CurrentPatentAssignee:I.G.FARBENINDUSTRIEAG(historic)-CH137136,1928,A
[2]CurrentPatentAssignee:WINTHROPCHEM-US1962277,1930,A
[1]CurrentPatentAssignee:I.G.FARBENINDUSTRIEAG(historic)-CH137134,1928,A