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Air filter condition sensing
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Patent number 11,617,980
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Issue date Apr 4, 2023
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3M Innovative Properties Company
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Jonathan B. Arthur
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Air filter condition sensing
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Patent number 11,607,635
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Issue date Mar 21, 2023
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3M Innovative Properties Company
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Jonathan B. Arthur
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Air filter condition sensing
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Patent number 11,202,982
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Issue date Dec 21, 2021
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3M Innovative Properties Company
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Jonathan B. Arthur
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Air filter condition sensing
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Patent number 10,646,809
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Issue date May 12, 2020
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3M Innovative Properties Company
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Jonathan B. Arthur
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Air filter condition sensing
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Patent number 10,363,509
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Issue date Jul 30, 2019
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3M Innovative Properties Company
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Jonathan B. Arthur
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL