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Detector cover
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Patent number D670187
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Issue date Nov 6, 2012
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Air Products and Controls Inc.
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David L. Hall
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D10 - Measuring, testing, or signalling instruments
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Detector cowling
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Patent number D645372
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Issue date Sep 20, 2011
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Air Products and Controls Inc.
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David L. Hall
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D10 - Measuring, testing, or signalling instruments
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Duct detector housing
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Patent number 7,204,522
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Issue date Apr 17, 2007
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Air Products and Controls, Inc.
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David L. Hall
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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78477923 - REDEBOX
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Serial number 78477923
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Filing date Sep 2, 2004
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Air Products and Controls Inc.
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments