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Chengzhe Jin
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Qinhuangdao, CN
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Patents Grants
last 30 patents
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 Applications
last 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