QUANMEI GUAN

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Patents Grantslast 30 patents

Information Patent Grant
Sidewall window structure module of train, and train
- Patent number 12,157,505
- Issue date Dec 3, 2024
- CRRC TANGSHAN CO., LTD.
- Jianqiang Du
- B61 - RAILWAYS
Information Patent Grant
Obstacle removing and energy absorbing device and leading car of mo...
- Patent number 9,409,580
- Issue date Aug 9, 2016
- Tangshan Railway Vehicle Co., Ltd.
- Letian Fan
- B61 - RAILWAYS

Patents Applicationslast 30 patents

Information Patent Application
SIDEWALL WINDOW STRUCTURE MODULE OF TRAIN, AND TRAIN
- Publication number 20220111877
- Publication date Apr 14, 2022
- CRRC TANGSHAN CO., LTD.
- Jianqiang DU
- B61 - RAILWAYS
Information Patent Application
OBSTACLE REMOVING AND ENERGY ABSORBING DEVICE AND LEADING CAR OF MO...
- Publication number 20140290528
- Publication date Oct 2, 2014
- LETIAN FAN
- B61 - RAILWAYS