-
-
-
3369598
-
Patent number 3,369,598
-
Issue date Feb 20, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3263441
-
Patent number 3,263,441
-
Issue date Aug 2, 1966
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
-
3147799
-
Patent number 3,147,799
-
Issue date Sep 8, 1964
-
F28 - HEAT EXCHANGE IN GENERAL
-
3006611
-
Patent number 3,006,611
-
Issue date Oct 31, 1961
-
F28 - HEAT EXCHANGE IN GENERAL
-
2573709
-
Patent number 2,573,709
-
Issue date Nov 6, 1951
-
F28 - HEAT EXCHANGE IN GENERAL