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Energy conversion system
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Patent number 4,432,336
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Issue date Feb 21, 1984
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Robert B. Black
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F24 - HEATING RANGES VENTILATING
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Energy conversion system
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Patent number 4,353,348
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Issue date Oct 12, 1982
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Robert B. Black
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F24 - HEATING RANGES VENTILATING
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Energy conversion system
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Patent number 4,271,789
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Issue date Jun 9, 1981
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Robert B. Black
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F24 - HEATING RANGES VENTILATING
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Energy conversion system
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Patent number 4,197,831
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Issue date Apr 15, 1980
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Robert B. Black
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F24 - HEATING RANGES VENTILATING
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Energy conversion system
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Patent number 4,025,291
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Issue date May 24, 1977
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Black; Robert B.
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Robert B. Black
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F24 - HEATING RANGES VENTILATING
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