Mao CAI

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Qingdao, Shandong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Method for producing a hollow support from a fiber composite materi...
- Patent number 11,331,865
- Issue date May 17, 2022
- CRRC QINGDAO SIFANG CO., LTD.
- Sansan Ding
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR PRODUCING A HOLLOW SUPPORT FROM A FIBER COMPOSITE MATERI...
- Publication number 20190351630
- Publication date Nov 21, 2019
- CRRC QINGDAO SIFANG CO., LTD.
- Sansan DING
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL