Thomas W. Johnston

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Scottsdale, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Air-conditioning duct filtering system
- Patent number 8,814,971
- Issue date Aug 26, 2014
- Johnston Engineering Company
- Thomas W. Johnston
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Information Patent Application
VARIABLE AIR VOLUME MULTI-ZONE SYSTEM AND METHOD THEREOF
- Publication number 20190301758
- Publication date Oct 3, 2019
- Thomas W. Johnston
- F24 - HEATING RANGES VENTILATING
Information Patent Application
AIR-CONDITIONING DUCT FILTERING SYSTEM
- Publication number 20140102056
- Publication date Apr 17, 2014
- Thomas W. Johnston
- F24 - HEATING RANGES VENTILATING