QS

Quan Song

📍 Zhejiang, NC: #5 of 5 inventorsTop 100%
Overall (2018): #271,802 of 503,207Top 55%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10046443 Ratchet structure for screwdriver Chenggang Sun 2018-08-14