-
-
-
2817507
-
Patent number 2,817,507
-
Issue date Dec 24, 1957
-
C21 - METALLURGY OF IRON
-
1829290
-
Patent number 1,829,290
-
Issue date Oct 27, 1931
-
F27 - FURNACES KILNS OVENS RETORTS
-
1613054
-
Patent number 1,613,054
-
Issue date Jan 4, 1927
-
F27 - FURNACES KILNS OVENS RETORTS
-
1451815
-
Patent number 1,451,815
-
Issue date Apr 17, 1923
-
F27 - FURNACES KILNS OVENS RETORTS