JH

Jang Young Han

UN Unknown: 1 patents #29,356 of 83,584Top 40%
Overall (All Time): #2,378,432 of 4,157,543Top 60%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12195135 Crank variable-speed gear device for increasing rotational power Dal Won SEO 2025-01-14