Hongzheng Ruan

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Ventilation cabinet
- Patent number 10,478,873
- Issue date Nov 19, 2019
- E3 GREEN TECHNOLOGY CO., LTD.
- Hongzheng Ruan
- B08 - CLEANING
Information Patent Grant
Steady flow structure and a ventilation apparatus having said stead...
- Patent number 10,357,810
- Issue date Jul 23, 2019
- E3 GREEN TECHNOLOGY CO., LTD.
- Hongzheng Ruan
- B08 - CLEANING

Patents Applicationslast 30 patents

Information Patent Application
VENTILATION VALVE
- Publication number 20190113248
- Publication date Apr 18, 2019
- E3 Green Technology Co., Ltd.
- Hongzheng RUAN
- F24 - HEATING RANGES VENTILATING
Information Patent Application
A STEADY FLOW STRUCTURE AND A VENTILATION APPARATUS HAVING SAID STE...
- Publication number 20180065161
- Publication date Mar 8, 2018
- E3 Green Technology Co., LTD.
- Hongzheng Ruan
- B08 - CLEANING
Information Patent Application
VENTILATION CABINET
- Publication number 20170182527
- Publication date Jun 29, 2017
- Hongzheng Ruan
- B08 - CLEANING