Kuo-Yi Chang

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Tantz Shiang, TW

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Patents Grantslast 30 patents

Information Patent Grant
Waist twisting machine
- Patent number 6,918,856
- Issue date Jul 19, 2005
- Kuo-Yi Chang
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Waist training machine
- Patent number 6,758,792
- Issue date Jul 6, 2004
- Kuo-Yi Chang
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Metal racket
- Patent number 6,254,501
- Issue date Jul 3, 2001
- Kuo-Yi Chang
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Waist twisting machine
- Publication number 20050026756
- Publication date Feb 3, 2005
- Kuo-Yi Chang
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE