Alfred Yu

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Edmonton, CA

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Patents Grantslast 30 patents

Information Patent Grant
Boat ballast system
- Patent number 6,382,121
- Issue date May 7, 2002
- Alfred Yu
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Human powered skibob
- Patent number 5,482,302
- Issue date Jan 9, 1996
- Alfred Yu
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS

Patents Applicationslast 30 patents

Information Patent Application
Boat ballast system
- Publication number 20010008113
- Publication date Jul 19, 2001
- Alfred Yu
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT