-
Preheating furnace
-
Patent number 4,153,236
-
Issue date May 8, 1979
-
Friedrich W. Elhaus
-
C21 - METALLURGY OF IRON
-
-
3713631
-
Patent number 3,713,631
-
Issue date Jan 30, 1973
-
F27 - FURNACES KILNS OVENS RETORTS
-
3384730
-
Patent number 3,384,730
-
Issue date May 21, 1968
-
C21 - METALLURGY OF IRON
-
3222043
-
Patent number 3,222,043
-
Issue date Dec 7, 1965
-
C21 - METALLURGY OF IRON
-
3189338
-
Patent number 3,189,338
-
Issue date Jun 15, 1965
-
C21 - METALLURGY OF IRON
-
2951491
-
Patent number 2,951,491
-
Issue date Sep 6, 1960
-
C21 - METALLURGY OF IRON
-
2850140
-
Patent number 2,850,140
-
Issue date Sep 2, 1958
-
F27 - FURNACES KILNS OVENS RETORTS
-
2620918
-
Patent number 2,620,918
-
Issue date Dec 9, 1952
-
F27 - FURNACES KILNS OVENS RETORTS
-
2335601
-
Patent number 2,335,601
-
Issue date Nov 30, 1943
-
F27 - FURNACES KILNS OVENS RETORTS
-
1872210
-
Patent number 1,872,210
-
Issue date Aug 16, 1932
-
F27 - FURNACES KILNS OVENS RETORTS
-
1833894
-
Patent number 1,833,894
-
Issue date Dec 1, 1931
-
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
-
1770446
-
Patent number 1,770,446
-
Issue date Jul 15, 1930
-
F27 - FURNACES KILNS OVENS RETORTS
-
1699955
-
Patent number 1,699,955
-
Issue date Jan 22, 1929
-
F27 - FURNACES KILNS OVENS RETORTS