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2625133
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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2619586
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Patent number 2,619,586
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B61 - RAILWAYS
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2240763
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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1963633
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1479556
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F22 - STEAM GENERATION
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1392924
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F22 - STEAM GENERATION
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1330612
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F22 - STEAM GENERATION
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1281835
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F22 - STEAM GENERATION
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1252720
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F22 - STEAM GENERATION
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1211753
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F22 - STEAM GENERATION
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1203639
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F22 - STEAM GENERATION
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1196283
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F22 - STEAM GENERATION
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1192292
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F22 - STEAM GENERATION
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1145853
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1137102
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F22 - STEAM GENERATION
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1129235
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862271
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756948
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670813
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660585
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607740
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461949
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444214
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399586
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368990
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351451
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343529
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333579
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276107
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230233
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