Seng Chang

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Fan shroud
- Patent number 12,129,785
- Issue date Oct 29, 2024
- Hoffman Enclosures Inc.
- Jeffrey Thibedeau
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Fan shroud
- Patent number 11,286,840
- Issue date Mar 29, 2022
- Hoffman Enclosures, Inc.
- Jeffrey Thibedeau
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Filter housing for filter fan
- Patent number 10,512,866
- Issue date Dec 24, 2019
- Hoffman Enclosures, Inc.
- Seng Chang
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Fan shroud
- Patent number D859631
- Issue date Sep 10, 2019
- Hoffman Enclosures, Inc.
- Seng Chang
- D23 - Environmental heating and cooling
Information Patent Grant
Support for a fan shroud
- Patent number D851742
- Issue date Jun 18, 2019
- Hoffman Enclosures, Inc.
- Seng Chang
- D23 - Environmental heating and cooling

Patents Applicationslast 30 patents

Information Patent Application
Fan Shroud
- Publication number 20220213832
- Publication date Jul 7, 2022
- Hoffman Enclosures Inc.
- Jeffrey Thibedeau
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
Fan Shroud
- Publication number 20190226385
- Publication date Jul 25, 2019
- Hoffman Enclosures, Inc.
- Jeffrey Thibedeau
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
Filter Housing for Filter Fan
- Publication number 20170232373
- Publication date Aug 17, 2017
- Hoffman Enclosures, Inc.
- Seng Chang
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL