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Fusible link assembly
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Patent number 4,936,287
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Issue date Jun 26, 1990
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Nailor-Hart Industries Inc.
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Andrew J. Hart
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Fire damper
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Patent number 4,763,711
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Issue date Aug 16, 1988
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Nailor-Hart Industries Inc.
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Andrew J. Hart
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A62 - LIFE-SAVING FIRE-FIGHTING
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Air control damper assembly
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Patent number 4,723,481
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Issue date Feb 9, 1988
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Nailor-Hart Industries Inc.
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Andrew J. Hart
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F24 - HEATING RANGES VENTILATING
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Fire damper
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Patent number 4,333,392
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Issue date Jun 8, 1982
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Michael T. Nailor
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F24 - HEATING RANGES VENTILATING
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Fire damper frames
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Patent number 4,269,255
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Issue date May 26, 1981
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Michael T. Nailor
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A62 - LIFE-SAVING FIRE-FIGHTING