Yun Yi Song

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Osan-si, KR

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Patents Grantslast 30 patents

Information Patent Grant
Transmission gear box for bikes
- Patent number 8,684,881
- Issue date Apr 1, 2014
- Yun Yi Song
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS

Patents Applicationslast 30 patents

Information Patent Application
TRANSMISSION GEAR BOX FOR BIKES
- Publication number 20130017922
- Publication date Jan 17, 2013
- Yun Yi Song
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS