QIANQIAN LI

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Patents Grantslast 30 patents

Information Patent Grant
Liquid chemical vapor recovery device, wet stripping device, photor...
- Patent number 11,231,652
- Issue date Jan 25, 2022
- BOE Technology Group Co., Ltd.
- Qianqian Li
- B08 - CLEANING
Information Patent Grant
Wet etching machine and etching method using the same
- Patent number 10,643,866
- Issue date May 5, 2020
- BOE Technology Group Co., Ltd.
- Shengrong Li
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
LIQUID CHEMICAL VAPOR RECOVERY DEVICE, WET STRIPPING DEVICE, PHOTOR...
- Publication number 20190064674
- Publication date Feb 28, 2019
- BOE TECHNOLOGY GROUP CO., LTD.
- Qianqian Li
- G02 - OPTICS
Information Patent Application
WET ETCHING MACHINE AND ETCHING METHOD USING THE SAME
- Publication number 20160343594
- Publication date Nov 24, 2016
- BOE TECHNOLOGY GROUP CO., LTD.
- SHENGRONG LI
- H01 - BASIC ELECTRIC ELEMENTS