Chengzhe Jin

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Qinhuangdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Rechargeable electric externally-hung venetian blind assembly
- Patent number 12,123,256
- Issue date Oct 22, 2024
- CHANGSHU HIGH-TECH ENERGY-SAVING DORWIN CO., LTD.
- Chengzhe Jin
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Hollow louver top operating system
- Patent number 11,421,472
- Issue date Aug 23, 2022
- CHANGSHU HIGH-TECH ENERGY-SAVING DORWIN CO., LTD.
- Chengzhe Jin
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Venetian blind mounted in double glazing unit and a sliding block t...
- Patent number 7,124,803
- Issue date Oct 24, 2006
- Renzhe Jin
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
RECHARGEABLE ELECTRIC EXTERNALLY-HUNG VENETIAN BLIND ASSEMBLY
- Publication number 20220235606
- Publication date Jul 28, 2022
- CHANGSHU HIGH-TECH ENERGY-SAVING DORWIN CO., LTD
- Chengzhe JIN
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
HOLLOW LOUVER TOP OPERATING SYSTEM
- Publication number 20200308904
- Publication date Oct 1, 2020
- CHANGSHU HIGH-TECH ENERGY-SAVING DORWIN CO.,LTD.
- Chengzhe JIN
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Application
Venetian blind mounted in doulbe glazing unit and a sliding block t...
- Publication number 20040211528
- Publication date Oct 28, 2004
- Renzhe Jin
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS