Kuo-Ching Yao

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Lu-chou City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Extension ladder with improved mechanism
- Patent number 7,316,293
- Issue date Jan 8, 2008
- Kuo-Ching Yao
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS

Patents Applicationslast 30 patents

Information Patent Application
EXTENSION LADDER WITH IMPROVED MECHANISM
- Publication number 20070267252
- Publication date Nov 22, 2007
- Kuo-Ching Yao
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Application
Extension ladder apparatus
- Publication number 20060283664
- Publication date Dec 21, 2006
- Kuo-Ching Yao
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Application
Extension ladder with improved structure
- Publication number 20060283665
- Publication date Dec 21, 2006
- Kuo-Ching Yao
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS