Siou Ru Chen

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Taichung City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Screwdriver having removable hidden tips
- Patent number 7,066,061
- Issue date Jun 27, 2006
- Yi Ying Chen
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Screwdriver having release mechanism
- Patent number 7,051,626
- Issue date May 30, 2006
- Yi Ying Chen
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC