CC

Chuan-Yi Cheng

📍 Keelung, TW: #254 of 650 inventorsTop 40%
Overall (All Time): #2,316,853 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5044234 Electrical screwdriver — 1991-09-03
5019688 Auxiliary soldering device for electric solder iron — 1991-05-28