-
-
-
3590916
-
Patent number 3,590,916
-
Issue date Jul 6, 1971
-
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
-
3384161
-
Patent number 3,384,161
-
Issue date May 21, 1968
-
F28 - HEAT EXCHANGE IN GENERAL
-
3198247
-
Patent number 3,198,247
-
Issue date Aug 3, 1965
-
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
-
2662742
-
Patent number 2,662,742
-
Issue date Dec 15, 1953
-
C01 - INORGANIC CHEMISTRY
-
470360
-
Patent number 470,360
-
Issue date Mar 8, 1892
-
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
-
344632
-
Patent number 344,632
-
Issue date Jun 29, 1886
-
F28 - HEAT EXCHANGE IN GENERAL
-
148978
-
Patent number 148,978
-
Issue date Mar 24, 1874
-
F28 - HEAT EXCHANGE IN GENERAL