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3580226
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3426734
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F22 - STEAM GENERATION
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3368534
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Patent number 3,368,534
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F22 - STEAM GENERATION
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3364904
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Patent number 3,364,904
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Issue date Jan 23, 1968
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F22 - STEAM GENERATION
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3356076
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Patent number 3,356,076
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Issue date Dec 5, 1967
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F22 - STEAM GENERATION
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3341118
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Patent number 3,341,118
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F22 - STEAM GENERATION
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3324837
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Patent number 3,324,837
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Issue date Jun 13, 1967
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F22 - STEAM GENERATION
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3310036
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Patent number 3,310,036
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Issue date Mar 21, 1967
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F22 - STEAM GENERATION
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3291106
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Patent number 3,291,106
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F22 - STEAM GENERATION
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3284008
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Patent number 3,284,008
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F22 - STEAM GENERATION
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3280559
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Patent number 3,280,559
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F22 - STEAM GENERATION
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3205870
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Patent number 3,205,870
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F22 - STEAM GENERATION
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3182640
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F22 - STEAM GENERATION
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3181527
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F22 - STEAM GENERATION
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3174464
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F22 - STEAM GENERATION
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3161180
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F22 - STEAM GENERATION
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3150643
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F22 - STEAM GENERATION
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3146760
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F22 - STEAM GENERATION
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3146761
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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3146759
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F22 - STEAM GENERATION
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3146763
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F22 - STEAM GENERATION
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3136301
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F22 - STEAM GENERATION