KS

Kwok-Kuen Sham

📍 Toronto, CA: #3,468 of 9,482 inventorsTop 40%
Overall (All Time): #2,197,800 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6507971 Training toothbrush — 2003-01-21
6457201 Training toothbrush — 2002-10-01