-
-
3623548
-
Patent number 3,623,548
-
Issue date Nov 30, 1971
-
F28 - HEAT EXCHANGE IN GENERAL
-
1839057
-
Patent number 1,839,057
-
Issue date Dec 29, 1931
-
F28 - HEAT EXCHANGE IN GENERAL
-
1160481
-
Patent number 1,160,481
-
Issue date Nov 16, 1915
-
F28 - HEAT EXCHANGE IN GENERAL
-
1073945
-
Patent number 1,073,945
-
Issue date Sep 23, 1913
-
F28 - HEAT EXCHANGE IN GENERAL
-
443201
-
Patent number 443,201
-
Issue date Dec 23, 1890
-
F28 - HEAT EXCHANGE IN GENERAL
-
308529
-
Patent number 308,529
-
Issue date Nov 25, 1884
-
F28 - HEAT EXCHANGE IN GENERAL
-
231861
-
Patent number 231,861
-
Issue date Aug 31, 1880
-
F28 - HEAT EXCHANGE IN GENERAL