Chengming DONG

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Zhejiang, CN

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Patents Grantslast 30 patents

Information Patent Grant
Frame forming structure for use with frame and sash of aluminium-wo...
- Patent number 11,268,318
- Issue date Mar 8, 2022
- ZHEJIANG ROOMEYE ENERGY-SAVING TECHNOLOGY CO., LTD
- Chengming Dong
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Assembly frame structure of wooden casement window and corner assem...
- Patent number 10,641,034
- Issue date May 5, 2020
- ZHEJIANG ROOMEYE ENERGY-SAVING TECHNOLOGY CO., LTD.
- Chengming Dong
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
Frame Forming Structure for Use with Frame and Sash of Aluminium-Wo...
- Publication number 20210293080
- Publication date Sep 23, 2021
- ZHEJIANG ROOMEYE ENERGY-SAVING TECHNOLOGY CO., LTD
- Chengming DONG
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Application
ASSEMBLY FRAME STRUCTURE OF WOODEN CASEMENT WINDOW AND CORNER ASSEM...
- Publication number 20180283088
- Publication date Oct 4, 2018
- ZHEJIANG ROOMEYE ENERGY-SAVING TECHNOLOGY CO.,LTD.
- Chengming DONG
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS