Changcheng LI

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Haidian District, Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Fan and cleaning device
- Patent number 12,253,090
- Issue date Mar 18, 2025
- BEIJING ROBOROCK TECHNOLOGY CO., LTD.
- Yuanjian Liang
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Fan and cleaning apparatus
- Patent number 12,209,591
- Issue date Jan 28, 2025
- BEIJING ROBOROCK TECHNOLOGY CO., LTD.
- Changcheng Li
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Stator, fan, and cleaning device
- Patent number 12,199,486
- Issue date Jan 14, 2025
- BEIJING ROBOROCK TECHNOLOGY CO., LTD.
- Changcheng Li
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Fan and cleaning device
- Patent number 12,188,476
- Issue date Jan 7, 2025
- BEIJING ROBOROCK TECHNOLOGY CO., LTD.
- Changcheng Li
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
FAN AND CLEANING DEVICE
- Publication number 20240084811
- Publication date Mar 14, 2024
- Beijing Roborock Technology Co., Ltd.
- Yuanjian LIANG
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
STATOR, FAN, AND CLEANING DEVICE
- Publication number 20230307978
- Publication date Sep 28, 2023
- Beijing Roborock Technology Co., Ltd.
- Changcheng LI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
FAN AND CLEANING APPARATUS
- Publication number 20230296101
- Publication date Sep 21, 2023
- Beijing Roborock Technology Co., Ltd.
- Changcheng LI
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
FAN AND CLEANING DEVICE
- Publication number 20230220852
- Publication date Jul 13, 2023
- Beijing Roborock Technology Co., Ltd.
- Changcheng LI
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...