Eugene Yonchia Chang

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Skin puncture device with needle stick protection
- Patent number 7,189,217
- Issue date Mar 13, 2007
- Joseph Jawshin Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
Skin puncture device with needle stick protection
- Publication number 20060189942
- Publication date Aug 24, 2006
- Joseph Jawshin Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE