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Ventilation fan control
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Patent number 5,364,026
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Issue date Nov 15, 1994
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Control Resources, Inc.
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Warren R. Kundert
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F24 - HEATING RANGES VENTILATING
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Fan speed controller
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Patent number 4,722,669
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Issue date Feb 2, 1988
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Control Resources, Inc.
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Warren R. Kundert
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G05 - CONTROLLING REGULATING
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Fan speed controller
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Patent number 4,659,290
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Issue date Apr 21, 1987
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Control Resources, Inc.
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Warren R. Kundert
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G05 - CONTROLLING REGULATING