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Paul Key
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Tucson, AZ, US
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Patents Grants
last 30 patents
Information
Patent Grant
Personal air filtration apparatus and method
Patent number
11,285,344
Issue date
Mar 29, 2022
Paul Key
A62 - LIFE-SAVING FIRE-FIGHTING
Information
Patent Grant
Personal air filtration apparatus and method
Patent number
10,967,208
Issue date
Apr 6, 2021
Paul Key
A41 - WEARING APPAREL
Information
Patent Grant
Personal air filtration apparatus and method
Patent number
10,159,857
Issue date
Dec 25, 2018
Paul Key
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
PERSONAL AIR FILTRATION APPARATUS AND METHOD
Publication number
20200155877
Publication date
May 21, 2020
Paul Key
A62 - LIFE-SAVING FIRE-FIGHTING
Information
Patent Application
PERSONAL AIR FILTRATION APPARATUS AND METHOD
Publication number
20180008847
Publication date
Jan 11, 2018
Paul Key
A41 - WEARING APPAREL
Information
Patent Application
PERSONAL AIR FILTRATION APPARATUS AND METHOD
Publication number
20170252588
Publication date
Sep 7, 2017
Paul Key
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL