-
2004890
-
Patent number 2,004,890
-
Issue date Jun 11, 1935
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F28 - HEAT EXCHANGE IN GENERAL
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1850211
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Patent number 1,850,211
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Issue date Mar 22, 1932
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F28 - HEAT EXCHANGE IN GENERAL
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1523838
-
Patent number 1,523,838
-
Issue date Jan 20, 1925
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F28 - HEAT EXCHANGE IN GENERAL
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1448451
-
Patent number 1,448,451
-
Issue date Mar 13, 1923
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F28 - HEAT EXCHANGE IN GENERAL
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1442565
-
Patent number 1,442,565
-
Issue date Jan 16, 1923
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F28 - HEAT EXCHANGE IN GENERAL
-
1377965
-
Patent number 1,377,965
-
Issue date May 10, 1921
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F28 - HEAT EXCHANGE IN GENERAL
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1355955
-
Patent number 1,355,955
-
Issue date Oct 19, 1920
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F28 - HEAT EXCHANGE IN GENERAL
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1346442
-
Patent number 1,346,442
-
Issue date Jul 13, 1920
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F28 - HEAT EXCHANGE IN GENERAL
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1295518
-
Patent number 1,295,518
-
Issue date Feb 25, 1919
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F28 - HEAT EXCHANGE IN GENERAL
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1271236
-
Patent number 1,271,236
-
Issue date Jul 2, 1918
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F28 - HEAT EXCHANGE IN GENERAL
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1239495
-
Patent number 1,239,495
-
Issue date Sep 11, 1917
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F28 - HEAT EXCHANGE IN GENERAL
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14826
-
Patent number 14,826
-
Issue date May 6, 1856
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES