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Steam generator
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Patent number 9,121,602
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Issue date Sep 1, 2015
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Russel Duane Van Wyk
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F22 - STEAM GENERATION
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Test circuit
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Patent number 4,007,713
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Issue date Feb 15, 1977
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Hydrolevel Corporation
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Michael J. DeLeonardis
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G01 - MEASURING TESTING
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3927791
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Patent number 3,927,791
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Issue date Dec 23, 1975
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F42 - AMMUNITION BLASTING
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3205871
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Patent number 3,205,871
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Issue date Sep 14, 1965
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G05 - CONTROLLING REGULATING
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2450739
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Patent number 2,450,739
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Issue date Oct 5, 1948
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F22 - STEAM GENERATION
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1849601
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Patent number 1,849,601
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Issue date Mar 15, 1932
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F22 - STEAM GENERATION
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1832712
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Patent number 1,832,712
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Issue date Nov 17, 1931
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F22 - STEAM GENERATION