Oh Kyoung-chan

Follow

Person

Seoul, KR

People

Patents Grantslast 30 patents

Information Patent Grant
Elasticity-controllable trampoline using plate spring
- Patent number 6,837,828
- Issue date Jan 4, 2005
- Oh Kyoung-chan
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Elasticity-controllable trampoline using plate spring
- Publication number 20040092366
- Publication date May 13, 2004
- Oh Kyoung-chan
- A63 - SPORTS GAMES AMUSEMENTS